Trainers

Custom Fit Personal Trainer and Gym Owner Evan Mather

Evan Mather

Personal Trainer / DEXA Technician / Owner

Born and raised in Oregon, fitness and athletics have always been a part of my life. From water polo to powerlifting to yoga, I view the diversity of my personal experience combined with science, proper nutrition, and education as the foundation for my approach to fitness. As a personal trainer, I recognize that everyone has a different concept of fitness and it’s my job to use my experience and knowledge to safely and effectively get results. Simply stated, I opened Custom Fit to provide the absolute best personal training and nutrition services available. We all follow a training protocol that has a primary focus on core strength, functional movements, correct form, and proper nutrition. From there, each program is custom fit to you and your goals, which we will track to show progress. Our objective is to help you achieve your goals as efficiently, safely, and as easily as possible.

Certifications & Education

National Academy of Sports Medicine (NASM) - Certified Personal Trainer

National Academy of Sports Medicine (NASM) - Fitness Nutrition Specialist

National Academy of Sports Medicine (NASM) - Performance Exercise Specialist

National Academy of Sports Medicine (NASM) - Corrective Exercise Specialist

International Sports Science Association (ISSA) - Certified Fitness Trainer

American Swim Coaches Association - Swim Coach, Level II

American Red Cross - CPR/AED/O2 Instructor

American Red Cross - Lifeguard Instructor (LGI)

Certified Bone Densitometry Technologist (CBDT)

Arizona State University - Bachelor of Arts (U.S. History)

Contact

Email: evan@customfitsf.com


CustomFit Personal Trainer: Mark Eaton

Mark Eaton

Director of Sports Performance & Testing / Exercise Physiologist / DEXA Technician

I was born and raised in Las Vegas, where I grew up playing a variety of sports.  My passion for health and fitness sprouted at a young age, leading me to move to San Francisco in 2012 to pursue my degree in Kinesiology.  I’ve gained a lot of experience training both in a gym setting, as well as working in a physical therapy clinic.  I try to combine my passions for health, fitness, and wellness to lead safe and effective workouts for everyone.  I firmly believe that fitness is a great way to train the body and mind to make the best version of yourself that you possibly can.


Certifications & Education

American College of Sports Medicine - Certified Exercise Physiologist

National Academy of Sports Medicine - Certified Personal Trainer

San Francisco State University - Bachelor of Science (Kinesiology/Neuromuscular Science)

University of California San Diego - Certified Bone Densitometry Technologist (CBDT)

RunDNA - L1 Gait Analyst

American Red Cross - CPR/AED


CustomFit Personal Trainer: Jennifer Barrett

Jennifer Barrett

General Manager - Market St / Personal Trainer / Assisted Stretching Specialist

I believe exercise holds an important key to longevity, happiness, and increasing overall daily life satisfaction.

My previous work experience was in healthcare, and after assisting in hundreds of surgeries, procedures, and rehabilitation, it opened a door I had not yet explored: prevention.

Exercise can do great things with overall physical and mental health. I take a creative approach with training, I find exercises and techniques that you will enjoy and that will benefit you and your personal goals.

Currently, I am in the process of getting my Pilates certification, and have practiced yoga for the last 8 years.

My strength training approach involves a variety of muscle building and toning exercises, with cardio, or an effective alternative to warm up your body for a safer and effective workout.

I am passionate about finding something that's enjoyable for my client, so my exercise programs will vary from person to person with a science based approach. 

Certifications & Education:

California State University, Chico - Bachelors of Science in Exercise Physiology with a minor in Health & Wellness.  

National Academy of Sports Medicine (NASM) Virtual Coaching Specialist 

National Academy of Sports Medicine (NASM) Certified Nutrition Coach

American Heart Association Basic Life Support 

Reformer Pilates Certified 

Assisted Stretching Certified


Isaac Kolberg

Director of Assisted Stretching

Whether you are chasing a dream physique, fluid movement, or the foundation to crush any workout, I'm here to help you get there.

I specialize in functional bodybuilding, sculpting not just aesthetics, but the power and agility of a true athlete. We'll build lean muscle mass through movements that mimic real-world function, leaving you strong and ready to tackle anything life throws your way.

As an ISSA-certified personal trainer and pain-free performance + hip specialist, I prioritize mobility and corrective exercises. My toolbox includes assisted stretching and targeted techniques to unlock your full potential, pain-free. My in-depth understanding of the connection between hip health and overall performance will guide you to long lasting range of motion.

Certifications and Education

International Sports Science Association (ISSA) - Certified Personal Trainer

International Sports Science Association (ISSA) - Hip Specialist

Pain-free Performance Specialist Certified (PPSC)

Functional Movement Training (FMT) - Rock Tape Cupping Certified


CustomFit Personal Trainer: Milad Ebadat

Milad Ebadat

Personal Trainer

In my mind, movement is the key to life. Through movement we can express ourselves mentally, physically, and creatively. Movement has inspired me to explore different places, experience different physical states, and finish my education. My approach to fitness looks at movement not only as a way to get fit but as a way of challenging oneself. Through challenge we grow and adapt with new solutions to movement and life’s obstacles.

With years of experience in hospitality, physical therapy, and strength and conditioning my ultimate goal as a trainer is to provide comfort, exercise adaptations, and education. To me, fundamentals are key, thus core training paired with mobility are my go to training modalities. Once fundamentals are established the fun begins. I like implementing strength and conditioning, HIIT, Kettlebells, calisthenics, therapeutic exercise, Pilates and mobility protocols. These styles of movement are just small pieces to the puzzle, and I am always eager to find new ways of moving and challenging myself.

Certifications & Education

National Strength & Conditioning Association (NSCA) - Certified Strength & Conditioning Specialist (C.S.C.S)

Functional Range Conditioning - Certified Mobility Specialist (FRC)

San Francisco State University - Bachelor of Science (Kinesiology)


CustomFit Personal Trainer: Adam Luu

Adam Luu

Personal Trainer

At a young age I was active but didn’t have a healthy eating habit. I would stuff myself with junk food and tons of sugar. Then I got introduced to wrestling and Brazilian jiu-jitsu, doing these sports taught me the importance of eating healthy and how impact our performance. 

Doing marital arts taught me self discipline and how to take care of myself to perform the best I can. Fast forward, after high school I continued on to become a trainer for 7 years. The feeling of helping someone overcome obstacles in their life through fitness has been so rewarding to me. I never knew fitness could have such a big impact in our lives until I heard clients telling me their relationships have gotten better, they are more clear minded throughout the day and they feel their confidence coming back. 

I am passionate about helping my client get the results they need through strength and conditioning training and building a strong foundation.

Certifications & Education

National Academy of Sports Medicine (NASM) - Certified Personal Trainer 

Level 1 - Animal flow 

Level 1 - Training for Warriors 


CustomFit Personal Trainer: Brandon Tran

Brandon Tran

Personal Trainer

Born and raised in San Francisco, growing up being the “runt” of the group I was seeking purpose and courage. Involving myself with fitness at the age of 14 has been one of the most life changing and rewarding challenges I’ve experienced. Till this day, I’ve made it a passion to continue the life long journey to becoming a better version of myself. Everyday that I’m active is another day I get to learn more about myself and what I’m capable of. Fitness has given me confidence to physically and mentally project myself in a positive light.

I have a profound passion for Martial Arts. During my freshman year of high school, I started wrestling and strength training and fell in love with both. This has lead me to explore other disciplines throughout my life. I am now participating in sports such as boxing and currently still strength training and actively practicing Muay Thai (Thai style boxing). 

I have made a commitment to improve the wellbeing of others by providing functional strength training while also, incorporating traditional muay thai or boxing fundamentals to keep it fun and exciting. I am a firm believer in building your body to have longevity and durability. 

Certifications & Education 

National Academy of Sports Medicine (NASM) - Certified Personal Trainer 

National Academy of Sports Medicine (NASM) - MMA Conditioning Specialist

MATRIX SPRINT 8 - Certified 

American Red Cross - Adult and Pediatric First Aid/CPR/AED

San Jose State University - Bachelor of Arts (Sociology - Cultural studies)


CustomFit Personal Trainer: Jen Rubin

Jen Rubin

Personal Trainer

I’m a Bay Area Native from Mill Valley. Growing up I spent my free time skateboarding, hiking, kayaking, body-surfing & swimming. I have always led an active healthy lifestyle and am constantly finding ways to challenge my body.
In my mid 20s I was struck with Celiac, this diagnosis forced me to adopt a disciplined diet (100% gluten free) and pushed me further into my fitness passion. Fortunately, it led me deeper into understanding the mind-body connection and enhanced my fitness lifestyle. This situation changed my perspective on work-life balance and wellbeing. I wanted a career that focused on health & wellness which led me to become a Certified Personal Trainer.

I have worked with many different clients, from de-conditioned working professionals, to retired athletes, to aging adults. My fitness beliefs revolve around having body awareness, understanding the dynamic between exercise, nutrition, and using movement as medicine. I structure my training to safely & effectively help my clients become strong. My goal is to help you boost your confidence, build and maintain strength and create a balanced lifestyle with a training program you will stick to consistently and also enjoy. I want you to look good and feel good! Outside of work I love to cook, bake, travel, explore the outdoors, and listen to music from classic rock to blues to hip hop and reggae. Getting a cup of chai tea or matcha is a daily ritual of mine.

Certifications & Education

National Academy of Sports Medicine (NASM) - Certified Personal Trainer


CustomFit Personal Trainer: Brandon Paesang

Brandon Paesang

Personal Trainer / Assisted Stretching Specialist

My passion for fitness and strength training started as a teenager growing up in Providence, Rhode Island. Driven by my desire to become the best version of myself, bodybuilding has allowed me to develop strength and confidence both inside and outside of the gym. With over a decade of experience lifting weights and exercising, sustaining fitness has never been more important to me for living a longer and healthier life.

My goal as a fitness trainer is to make fitness fun and enjoyable by working alongside my clients on building up their bodies all while laughing along the way. I look at where my clients currently are with their strength, cardio, mobility, and movement patterns and build my fitness programs accordingly. I bring a holistic bodybuilder’s approach to general fitness meaning a high focus on solid form, building a deep mind-to-muscle connection, and a focus on quality movement. Whether your goal is to lose weight, put on muscle, overcome an injury, or just feel overall better in your everyday life, I am the trainer for you.

Certifications and Education

American Council of Exercise (ACE) - Certified Personal Trainer

KILO Strength Society - Program Design

Pain Free Performance Specialist

Assisted Stretching Certified


CustomFit Personal Trainer: Glenn Valledor

Glenn Valledor

Personal Trainer

Born and raised in the city, I discovered my passion for fitness through playing baseball up until the high school and collegiate level. The impact that exercising and stretching had on my performance on the field made me realize the potential benefits it could have in everyday life. I began my fitness career in a customer service role and eventually transitioned to a personal trainer role at UCSF. Over the years I have dedicated myself to honing my skills and providing the highest quality training to my clients. My training philosophy focuses on making workouts enjoyable, safe, and challenging, while keeping my clients' goals in mind.

Certifications & Education

NASM ( National Association of Sports Medicine)

Emergency Medical Technician

Firefighter 1


Charles Personal Trainer

Charles Armstrong

Personal Trainer

Growing up in Baton Rouge, Louisiana. As a child, I suffered with anxiety. I avoided social environments that involved a lot of people--that is, until I was 17 years old and met the powerlifting coach at my high school. I gave it a try and was instantly hooked! Powerlifting helped me gain confidence by forcing me to face my fears of being in front of large groups of people. This helped me conquer two beasts at one time: (1) my anxiety toward being in or around a lot of people and (2) the initial obstacle before dedicating myself to a lifestyle of fitness.

During my five years in the Navy, I trained more as an endurance athlete and grew to love it. I found endurance training was not only a good workout, but it was another way for me to challenge and push myself in other personal goals. After the Navy, I moved to San Francisco for college in the kinesiology program. I reached out to the Men’s basketball coach at San Francisco State University and began utilizing my education in an actual role. I designed the team’s strength training programs, coached them in weightlifting with proper form,and taught sport specific exercises. Once the season started the players were able to maintain their strength, speed, and power that was required of them to compete.

Health and fitness are key to one’s overall mood and wellness. The greatest lesson I took away from competing is that humans are meant to move! Why? I’ve come to find out that the less I move, the less energy I have. In addition, movement brightens my mood and really makes me feel like I’ve accomplished something in my day, which ultimately helps me smile more. As far as moving, always find what works for YOU. Maybe you don't enjoy running, so make your workout FUN and ENJOYABLE to YOU, then use that as a gateway into a more active lifestyle.

Certifications & Education

San Francisco State - Bachelor of Science (Kinesiology)

National Academy of Sports Medicine - Corrective Exercise Specialist

National Academy of Sports Medicine - Performance Exercise Specialist 

National Strength & Conditioning Association - Certified Strength & Conditioning Specialist 

Certified Functional Strength Coach - Level 1

Functional Movement Specialist - Level 2

Precision Nutrition 

KILO strength program design 


Stefan Todorovic

Personal Trainer

Born and raised in Serbia, I grew up playing competitive soccer and started lifting weights at a young age. Fitness is my lifestyle. Staying hungry and never satisfied is my daily motivation.

Let's work together on building healthier and stronger versions of ourselves. Personal training is more than just physical exercise. I believe that exercise plays a key role in stress reduction and the improvement of mental health. I want to build a positive and motivational environment where clients feel empowered to push their boundaries and unlock their true potential.

No matter your age, fitness level, or specific goals, I’m here to help you transform your lifestyle, improve your physical performance, and enhance your overall well-being. Whether you're looking to lose weight, build strength, learn movement patterns, or simply adopt healthier habits.

I will provide the guidance, expertise, and accountability needed to make lasting changes.

Certifications & Education

National Academy of Sports Medicine - Certified Personal Trainer


CustomFit Personal Trainer: Anthony D'Andrea

Anthony D’Andrea

Personal Trainer

By taking the time to truly get to know you, your goals, and building a strong foundation, I believe your potential is boundless. Through an in-depth fitness assessment designed to understand your unique needs, I create a completely customized training plan tailored to you. Whether you’re in training for a triathlon, want to smile every time you look into a mirror, or simply looking to confidently say & ”YES!” to your next hiking invitation from a friend, I’m committed to meet you where you are and help you get there. Guiding you to shape a body built for all of life’s adventures is my passion!

My fitness journey began when I was preparing for Navy Dive School. I became fascinated by the mental and physical resilience people can develop when striving to reach a goal. My fitness goals started small, celebrating the little wins along the way, and eventually grew to include long-distance triathlon races. After my military service, I discovered a passion for helping clients achieve their fitness goals but took a detour to become a financial advisor. 

While I was sharpening my skills in goal-setting and strategic planning, I also came to understand the firsthand impact of being desk-bound all day. Grappling with long work hours, a sedentary lifestyle, and the mental strain they carried, I once again embraced my true calling: empowering individuals to enhance their physical well-being by guiding them through the complex fitness world, with expertise, kindness, motivation, and unwavering support. As a dedicated student of life, my drive for knowledge is never-ending. I explore diverse schools of thought which allow me to offer my clients workouts rooted in the latest results-driven research and real-world application.

I aspire to create a training environment that fosters growth by establishing a strong connection between the mind and muscles through intentional movements. We live in a world that is constantly on the move and there will inevitably be days when sleep or nutrition fall short. During those moments, I am here to offer even greater support, adapting and making the changes needed to keep you feeling your best.

I specialize in creating tailored training programs, functional strength and conditioning, mobility and stability enhancement, balanced muscle growth, effective weight loss, as well as flexibility and mobility for desk-bound professionals.

During my down time, you’ll find me immersed in ocean dives, trekking alongside my rescue pup on hiking adventures, or cruising on a long motorcycle ride. My constant pursuit is to discover life’s balance, one mindful movement at a time.

Certifications & Education

National Academy of Sports Medicine - Certified Personal Trainer

National Academy of Sports Medicine - Mixed Martial Arts Conditioning Specialist

FKT | Functional Kettlebell Training Specialist

BRM | Barbell Rehab Method Certified

KILO Strength Society | Advanced Strategies to Program Design

PPSC | Pain-Free Performance Specialist

Animal Flow Level 1

Trigger Point - Myofascial Compression Techniques

San Diego State University, Fowler College of Business, Bachelor of Science in Business Administration – Financial Services


CustomFit Personal Trainer: Lisbet Guzman Lemus

Lisbet Guzman Lemus

Personal Trainer / Assisted Stretching Specialist

"Become what you've always wanted to be". That's the quote that I live by to this day. Being a Mexican native and a daughter of two immigrant parents, fitness was never a priority. Yes, I grew up playing sports such as soccer and track, but school was always number one. When I came out to San Francisco in 2016 to pursue my dream as an artist, I realized it was going to be much harder than I thought. I developed a lot of stress because of school and found my outlet in the gym. I started my journey not knowing much but stayed committed. I went in every day even after 8-12 hour painting sessions to let my body move and react in ways it never did before. Starting at just 100 lbs, I changed my eating habits, became more aware of my body's needs, and actually listened to those signs and gained 30 lbs in the process. I have become who I wanted to be, feeling strong, understanding movement patterns and now I can help others.

My goal as a personal trainer and fitness advocate is to help others move well, move pain-free, and move freely. I program with needs and wants in mind and believe that building strength and mobility is the key to pain-free moving. Whether you are looking to gain or lose weight, increase flexibility and mobility, body build, work on endurance or simply want to move well, I know we can work on those things together and get you to where you want to be and then some.

Certifications:

American Council on Exercise (ACE) - Certified Personal Trainer

American Council on Exercise (ACE) - Corrective Exercise Specialist

Assisted Stretching Certified


Personal Trainer - James

James Coca

Personal Trainer

I began my journey in the fitness industry in 2015 with the intention of helping people work to their goals with efficiency and minimal injury risk. Having fallen in love with basketball as a young kid, I set out to become the best athlete I could, hoping to one day play sports professionally. Limited knowledge of how to train for sport and properly refuel and rest my body slowly wore me down physically, resulting in many ailments, movement compensations and lingering pain. Seeking remedy for my own issues, I gained inspiration to dedicate my learning more about the human body, proper training technique and nutrition, to better serve others towards achieving their desired results. I use these pillars to create fun, strategic and systematic training programs, while striving to always be a student who never feels their learning is complete.

Certifications and Education:

National Academy of Sports Medicine - Certified Personal Trainer (CPT)

National Academy of Sports Medicine - Corrective Exercise Specialist (CES)

National Academy of Sports Medicine - Performance Enhancement Specialist (PES)


CustomFit Personal Trainer: Johnny Kunstadter

Johnny Kunstadter

Personal Trainer

I grew up playing sports, but it wasn't until after high school that I began to form a real understanding of strength and athletic training. Before I became a personal trainer, I trained and participated in combat sports (primarily submission grappling but also kickboxing and MMA) as both a competitor and a coach. My training philosophy is that strength is the key which unlocks everything else, whatever one's goals may be.

Certifications & Education

National Academy of Sports Medicine (NASM) - Certified Personal Trainer

National Academy of Sports Medicine (NASM) - Corrective Exercise Specialist

USA Weightlifting (USAW) Level 1

Eleiko Level 1 Strength Coach


Personal Trainer Steve

Stephen Grubbs

Personal Trainer

I went from a bartender to a personal trainer in 2005. I attended a 500 hour school for personal training at NPTI where I earned a diploma as well as a certificate in nutritional counseling.

From there, my lifestyle and body went through a transformation and found joy in all things physical. Immediately I got a certificate for mat pilates, ran a marathon on a dare and then delved deeply into mixed martial arts.

After falling in love with jiu jitsu and muay thai, I found myself ahead of my peers training with the best of bay area fighters. My strength and conditioning made up for my lack of experience and the programs I developed for my sport now influence my client's workouts. Mixing pilates, HIIT, weights, and plyometrics.

My programs are designed to keep my clients engaged and moving strong.

Certifications & Education

NPTI - Certified Personal Trainer

NPTI - Nutrition Counseling Degree

Mat Pilates Certification


CustomFit Personal Trainer: Darioush Ebadat

Darioush Ebadat

Personal Trainer / Running Mechanics Specialist

I'm a fitness professional with a deep passion for biomechanics and a specialization in running mechanics.

With a background in kinesiology and four years of experience as a physical therapy aid, I've honed the skills and knowledge needed to help you optimize your running form and prevent injuries. My approach focuses on building a strong mind-body connection through targeted strength exercises, plyometrics, and running drills.

If you're looking to enhance your running economy, refine your mechanics, or simply run faster, I'm here to guide you on your journey to success. Let's take your running to the next level together!

Certifications & Education

San Francisco State University - Bachelor of Science (Kinesiology/Neuromuscular science)

National Academy of Sports Medicine - Certified Personal Trainer

Level 1 Running Gait Analyst

Level 2 Running Gait Analyst


Peter Personal Trainer San Francisco

Peter Fonteneau

Personal Trainer / DEXA Technician

I started my fitness journey like many other 15 year old kids growing up in San Diego - I signed up for the local gym to get some muscle for the beach! What I didn’t realize when I walked through the doors that day was that I had found something that would ignite a lifelong passion. In 2008 I moved to the bay area to attend Sonoma State University where I would go on to get my bachelors degree in Kinesiology to begin a lifelong pursuit of health, fitness and movement.

In my 10 years as a trainer I have a diverse background of experiences: training in gyms, running large and small groups (indoors and out), rehab clinics, athletic training development, corporate fitness and kettlebell specialization. This wide array of experiences has helped to build a foundation of knowledge and confidence to be able to help anyone achieve any goal they wish to attain

My approach as a trainer is to teach movement, and fundamentally change behaviors. I don’t believe in a one size fits all approach - there are many different paths that lead to success and I am committed to finding the one that will best suit your lifestyle while leading to your goals, so that we can make changes that will last long term. Whatever the path we take, we’ll be sure to improve strength, correct movement patterns and postures, and have fun along the way!

I take a data-driven approach, through testing and tracking, as a way of constant feedback so that we can make sure you are maximizing the results from your hard work. My ultimate driver is to teach and instill a lifelong movement practice with everyone I work with.

Certifications & Education

Sonoma State University - Bachelors of Kinesiology

University of California San Diego - Certified Bone Densitometry Technologist (CBDT


Personal Trainer in San Francisco

Chris Finlez

Personal Trainer / Assisted Stretching Specialist

I was Born in Chicago although I spent the majority of my life in Northern California. My path to this field stems from my experience as a collegiate athlete. Playing Soccer in college allowed me to experience a wide array of injuries which halted my ability to pursue my life long passion. However my passion for the understanding of the human body and movement came into fruition in my last couple years of college. Knowledge in this field allows me to continue exploring physical challenges myself as well as help others explore their bodies potential.

 I believe in a holistic approach to health and fitness by incorporating healthy rest and a well balanced diet being just as crucial as our time spent in the gym. In the gym I like to focus on functional movements with an emphasis on building a solid foundation that will allow you to achieve any physical goals you have while minimizing injury. I believe physical, mental and spiritual growth starts and ends with your health. Designing the right program based on  your fitness level can allow us to achieve any goals you set forward while providing your body with the love and care it deserves.

Education & Certifications

SF State University - Bachelors of Science (Exercise Physiology)

National Academy of Sports Medicine - Certified Personal Trainer

Assisted Stretching Certified


Robin Shapiro

Personal Trainer

Athletics and movement science have been a passion of mine since I first started playing soccer at a young age. Fine tuning specific movements in training for sports performance helped to improve my efficiency and power necessary to play competitively. As a teenager, I was naturally underweight and needed to develop a weight and body training program that could help me gain lean weight, improve my strength and mobility, and ultimately result in more effective injury-free movement on the field. This led me to my passion for physical therapy and athletic training. My journey started with becoming NASM certified but has continued into participating in biomechanics research studies, learning how to utilize MATLAB to code kinematic biomechanical data, and working in a sports orthopedics physical therapy clinic. I combine my love for movement science and connecting with people to create customized training programs that address my clients' goals in an environment that is fun, intense, and rewarding.


Certifications and Education

National Academy of Sports Medicine (NASM)

Sonoma State University - Bachelors of Science (Kinesiology/Exercise Science)


Wesley Woo

Personal Trainer

Growing up, I overlooked health and exercise often. I was out of shape, overweight, and lacked any sort of drive and self confidence. Everything changed when I got my first gym membership in High School.

I fell in love with weight training, got into good shape, gained confidence, and found a direction to lead my life. Since then, I have continued to train, got my degree in Exercise Science, and became a certified Personal trainer.

Now I aim to use everything I've learned about exercise to help my clients in their own fitness journeys. I believe a healthy lifestyle has so many benefits to offer both physically and mentally and I think everyone should give it a try.

My goal as a trainer is to make exercise fun and enjoyable for my clients while also helping them reach their goals. If you're looking to get stronger, build muscle, lose weight, or just get active, I believe I can help.

Certifications & Education

American Council on Exercise (ACE) - Certified Personal Trainer

San Francisco State University - Bachelor of Science (Kinesiology/Exercise and Movement Science)


Stefan Jurado

Personal Trainer

My journey in fitness began at the age of 14 when I enrolled in a weight training class. My instructor was a former trainer to olympic athletes, and he preached the importance of living a healthy life. I was fascinated by human anatomy and how the muscles in our bodies work together to help us move. I was inspired to learn more about ways that we can develop healthy habits to improve quality of life, and in the process of that I found purpose in spreading this knowledge to people looking to progress their health.

As someone passionate about mental & physical well-being, I aim to uplift those I work with who are on a journey to self improvement - whether they are new to the world of fitness, or have years of experience. Each person has their own definition of what physical fitness means to them, and it means a lot to me to be able to help in achieving that goal.

I specialize in strength training that utilizes machines, free-weights, and calisthenic exercises. I believe that proper form is at the foundation of all exercise, allowing for the safe and efficient progression of your physical fitness.

Outside of training I love cycling, finding new recipes to cook, practicing martial arts, playing guitar and exploring music genres.

Certifications & Education

Associate's Degree in Kinesiology 

ACE - Certified Personal Trainer


CustomFit Personal Trainer: Jonathan Rivera

Jonathan Rivera

Personal Trainer / Assisted Stretching Specialist

Born and raised in SF in a Hispanic household. I was overweight and was never happy with myself. I didn’t like looking at myself in the mirror and nobody in my family was into fitness. I decided to get into fitness myself and even though I managed to lose 67 lbs. I made so many mistakes and injured myself by overtraining throughout the process.

I realized how important investing in your own health can be. Fitness became a passion and I want to help others to not make the same mistakes I did when I started. I changed my major in school to study to become a PT and got into nutrition to level up my training. The more I learned the more I knew I could help more people. 

My goal as a personal trainer is to make fitness fun and to help people achieve their goals in a safe manner with proper training . I work on strength and mobility to make sure everyone can move throughout their days without any pain or discomfort.

Whether your goal is to lose/gain weight, work on mobility, endurance, to train with an injury, or just to feel better over all, I will be there to support and guide you.

Certifications & Education

ISSA - Certified Personal Trainer


Krishen Dongre

Personal Trainer

My passion for fitness started at a young age playing a variety of sports growing up in the Bay Area.  I was never really talented but what I lacked in skill I made up for in effort.  I knew I had to bridge the gap.  After going through phases training for strength with Powerlifting, being more fit with Crossfit style workouts, then focusing on power through Olympic Weightlifting, I realized that what it really comes down to is fitness for longevity.   

I attended Cal State East Bay for both my Bachelors and Masters Degrees in Kinesiology where I focused on a broad range of topics including Physiology, Biomechanics, and Exercise Psychology.  The knowledge I’ve amassed through school and 10 years of experience has helped me train individuals with a variety of goals whether they’re looking to lose weight, build muscle, or improve their overall health.  

My training philosophy is all about building a strong foundation and instilling good habits.  I am a firm believer that to live a long healthy life, exercise is the backbone, while moving often and well are requirements in creating long lasting results.  Training with me is more than exercise and burning calories.  It is a systematic process that starts with seeing how you move and creating a plan from there.  I understand that everyone's fitness journey is different, so I tailor my training programs to each individual client's needs, goals, and lifestyle. I also focus on creating a supportive and encouraging environment where my clients feel comfortable pushing themselves.  

Certifications & Education:

M.S. in Kinesiology

ACSM - Certified Exercise Physiologist

USAW - Sports Performance Coach Level 1


John Napoletano

Personal Trainer

Born and raised in Fairfield, California. Fitness has always been involved in my life in some way. Growing up I played soccer for about 10 years before I found that my real passion was in the weight room. Being strong is always something that has been important to me, so when I found strength sports, I began to thrive. Starting to compete in strongman and powerlifting is what drove me to getting my certifications. I found that by helping people get stronger and bring up their weak points, it had a lot of carry over into their everyday life. Outside of competing, my true passion is helping people, and the best way I have found to do that is by building confidence through exercise. The other thing I love about being in this industry is helping people work on imbalances and get them out of pain. I like to execute a mixture of methods to achieve the desired result and I’ve found that in doing so it helps keep the gym interesting.

Outside of the gym I love to read, listen to music, and spend quality time with my family.

Certifications:

ISSA Certified Personal Trainer

NESTA Certified Physique and Figure Training specialist

Precision Nutrition Level 1

Certified in CPR AED First aid


Lance Huber

Personal Trainer

My approach as a trainer is to build confidence and create lasting habits to help improve one's overall quality of life. I emphasize strength training modalities that can be transferred from the gym to daily life. I believe everything a person does inside the gym makes everything they do outside the gym better. My programs are structured to have clients progressively build toward their ultimate goal. Everybody is different therefore every body is different, so training programs are catered to my client’s individual needs. My ideal client is anyone with a goal, a positive attitude, and a willingness to work hard. 

My love for fitness started when I was in high school competing in sports such as football and basketball. It was during this time that I learned the importance of exercise and proper nutrition. I became aware of how it had an impact on my overall health and wellness. I attended Central Michigan University to earn my bachelors degree in Exercise Science. From there I developed my passion to help other people obtain their highest quality of life via fitness. 

I have over 16 years of experience as a trainer. From training individual clients to large groups, I’m also experienced with sports performance training and working in physical therapy clinics. My career has led me to take on several management positions in corporate fitness clubs. I’ve coached and mentored other trainers, helping them to develop skills and build successful businesses. This wide array of experiences has helped to build a foundation of knowledge, communication skills, and confidence to be able to help anyone achieve any goal they wish to attain.

Certifications & Education

National Council of Strength and Fitness (NCSF) - Certified Personal Trainer

Precision Nutrition - Level 1

Functional Movement Specialist - Level 1 & 2

TRX Suspension Trainer Certified

National Academy of Sports Medicine (NASM) - Corrective Exercise Specialist

National Academy of Sports Medicine (NASM) - Performance Exercise Specialist 

Central Michigan University - Bachelor of Science (Exercise Science)


Shamara Carney

Personal Trainer

As a lifelong athlete and former Division 1 track and field competitor, my passion for movement and fitness is the heart of my career. With over 9 years in strength training and NASM certification, I blend deep experience with expert knowledge for my clients.

I'm a proud graduate of the University of California, Santa Barbara (Bachelor's) and the University of Southern California (Master's). My training style combines adaptive functional training with traditional weight training, aiming to unlock movement and strength in everyone, from seasoned athletes to fitness newbies.

Beyond the gym, you'll often find me indulging in my favorite hobby – running. Whether it’s a peaceful trail, a bustling road, or the familiar track, there’s nothing like a good run to clear my mind and invigorate my spirit.

It's my mission to empower your fitness journey, guiding you towards a stronger, more liberated life through the transformative power of movement.

Certifications & Education

NASM Certified Personal Trainer 

Slow Resistance Training (SRT) Certified 

USA Track & Field Coaching Level 1 Certified (USATF-1) 

Masters in Strategic Public Relations from University of Southern California (USC) 

Bachelors in Business Communication from University of California, Santa Barbara (UCSB) 

Former Division 1 Track and Field Athlete at UCSB 


Leo Kaiser

Personal Trainer

Hi, I’m Leo Kaiser, your personal trainer at Custom Fit. I specialize in lean muscle building, longevity, mobility, flexibility, fat loss, and making fitness fun through gamification. At Custom Fit, I tailor each workout to your unique goals, ensuring you get the most effective and efficient training. My focus is on creating lasting habits for lifelong health, blending strength training, cardio, and flexibility work. I believe fitness should be enjoyable, so I turn workouts into engaging activities to keep you motivated. As your coach and partner, I'm committed to your success and overcoming any obstacles together. Join me at Custom Fit, and let's make your journey to a healthier, fitter, and happier you a reality.


Simon Zhang

Personal Trainer

Hi there!. Let me share a bit about myself. Growing up, I was that shy, skinny kid who always hung back in the crowd. But about ten years ago, I decided it was time for a change and started my fitness journey. Little did I know, this journey would light a fire in me, boosting my confidence and transforming how I approached life and people.

Before diving into personal training, I was a swim instructor through high school and college. I loved every minute of it! There's nothing quite like watching someone progress and knowing you played a part in their journey. After looking back, that's when I realized how much I enjoyed teaching and supporting others.

As your personal trainer, my mission is to help you achieve the physical and mental transformation you've always envisioned for yourself. While my main focus as a trainer is body recomposition, I firmly believe that creating a surrounding where we enjoy the process is going to produce the longest lasting results. Whether your goal is to gain muscle and become stronger, lose weight, or just to improve your overall health, we’ll work together to create catered workouts along with sustainable lifestyle changes to ensure we're in a safe, efficient, and most importantly, fun environment.

When I'm not in the gym, you can find me learning a new language or enjoying some downtime with video games.

Let's get started on this exciting journey together. I can't wait to see what we can achieve!

Certifications & Education

American Council of Exercise (ACE) - Certified Personal Trainer