Changing the way people think about fitness!



Changing the way people think about fitness!



In 2010, we opened Body By X Skill Development & Training Center to help people reach and maintain their fitness goals in a friendly, fun environment.  Our belief is that everyone and every body is unique and therefore everyone's fitness program should be unique as well!  Our 4,000 square foot facility in Corte Madera has state-of-the-art equipment, the largest commercial infrared sauna in Southern Marin and a welcoming environment that puts someone new to a gym completely at ease and makes a gym rat feel right at home.  Body By X also has a Power Plate and the only bioDensity device in Marin.  bioDensity is the first non-pharmaceutical solution for building bone density and reverses osteoporosis and osteopenia.  Body By X is leading the movement to reverse low bone density in people of all ages.  Body By X also provides motivating, fun and challenging classes including the ONLY rowing class offered in a fitness center in Marin, Rhythm Ride with X--an indoor cycling class like NONE other that will have you feeling like you're dancing on a bike, and Aerial Fitness--a challenging workout using swings suspended from the air.  

All of these great offerings come at a terrific price!  We believe everyone should have access to affordable exercise!

We created Body By X to meet the needs of those in OUR community who want a smaller, more personal space to work out.  We're like NO other fitness center, and we believe, as all of our members do, that we're the best in Marin.  

Keep reading to learn how we're changing the way people think about fitness!

The Body & X!



THE "X" IN BODY BY X...and the body too!

Xavier has been a personal trainer for over 30 years. His vision for Body By X was to create a space where kids and adults could overcome their physical and emotional fears and improve their self-esteem. Known to all as "X", Xavier's athletic process as a kid had him heading towards the NFL but a serious knee injury in his late teens thwarted his plans. Being an athlete led Xavier to the gym and he began his career in fitness on the sales side. He quickly realized, however, that to achieve long-term success, people needed more than just signing a contract. So, he decided to become a personal trainer. Since then he's helped hundreds of people reach their goals and sustain a healthy lifestyle. Over the years, Xavier has learned not just to listen but to REALLY HEAR the needs of people of all ages. It's this ability that helps him encourage people to move beyond their perceived limitations.

Xavier was named Best Personal Trainer in San Francisco's Bay Guardian's Best of the Bay 2010 Readers Poll . He has coached boys and girls CYO and AAU basketball teams to championships and many tournament wins and is known for his work with kids and youth athletes. His experience as a youth athlete and the wealth of knowledge gained over the years as a trainer make him uniquely qualified to work with kids. But it is his heart, enthusiasm and passion that turns a B athlete into a star. These same qualities have helped men and women of ALL ages build confidence and reach their goals.

Xavier is an extraordinary trainer whose smile lights up a room and whose energy is unsurpassed.



Nadia is a personal trainer and teaches our Aerial classes, Buns & Bellies and the TRX part of our T-Row-X class! She also manages the business side of Body By X including marketing and community outreach. Nadia has worked in advertising, retail management and as a project manager for a software company. She has a master’s degree in psychology and all of these experiences have prepared her well for gym ownership!

What makes Nadia's contribution to Body By X so special though, is the fact that she was gym phobic until the age of 38. So gym phobic that she'd never been to a gym! Until...she met Xavier!

Xavier and Nadia met a a party held by a mutual friend. Neither was interested in a relationship but Nadia felt an instant and strong connection to Xavier and when the evening ended she had an idea! She decided that the only way to get Xavier to feel the same connection was to hire him as her personal trainer!

A week later she found herself on a treadmill at 6 am, warming up for her first personal training session. Over the next few months, Nadia fell in love with strength training. It gave her so much internal strength and confidence. She also fell in love with Xavier. And fortunately, he fell in love with her!

When Nadia and Xavier decided to open a fitness center of their own Nadia knew she wanted to create a space that was welcoming, safe and fun. Xavier helped her change the way she thought about fitness and she wanted to do the same for others!


Fitness Center Services

Fitness Center Services

Adult, Family & Student Memberships - Classes - Fitness Consultations & Evaluations -
Personal Training - Low bone density solutions including bioDensity - Infrared Sauna - 
Athletic Training - Power Plate - Cycling Studio - Youth Training (including equipment just for kids) - Basketball Court - Slackline Training - Balance & Flexibility Tools & Training -
Custom Fitness Packages - Showers

NEW CLASSES: Aerial Dance, Aerial Yoga & FlyWHEEL FRENZY!

Please call us to get more information.


We offer adult, Family & Student Memberships!

A 1- year GOLD membership at Body By X includes:

Unlimited classes:

  • Aerial Fitness

  • Aerial Play

  • Intro to Aerial Fitness

  • Aerial Dance

  • Aerial Yoga for Kids & Adults

  • Rhythm Ride with X

  • TRXtra

  • Viva La Yoga

  • Group X

  • Fitness Rowing

  • Camp X

  • Buns & Bellies

  • T-Row-X

  • Swing Low Core & Stretch Using A Hammock

  • Flywheel Frenzy (rowing & strength training)

Use of our:

An introductory session on our bioDensity device to increase the density of your bones, tendons and ligaments.

Not interested in taking classes but prefer to work out on your own and use our state-of-the-art equipment, infrared sauna, Power Plate and more?  We have a membership option for you!

Email us @ info@getfitmarin.com

Not a member yet? Drop in for $25 a class or $25 to use all aspects of our facility and see how we're different from other fitness facilities in Marin County. We promise you'll love it! Be sure to check out our schedule to see when our fitness classes occur.  We look forward to seeing you soon.


We have the best personal trainers in Marin County!  

You can view their profiles here. Personal training fees vary depending on the trainer and how many sessions you purchase. 

Personal Training Information

Please feel free to call us with any questions.



The Non-pharmaceutical solution for building bone and joint density.

The bioDensity system safely aids in increasing bone density by stimulating the body’s natural bone generation process.  Based on existing science of bone compression, bioDensity applies optimal biomechanics and increases density in bone, tendons and ligaments.

See the Video Below

The Surgeon General Chapter 9 States that increases in bone mineral density are stimulated by maximum loading of the musculoskeletal system.

Infrared Sauna Marin

Infrared Sauna Use @ Body By X Skill Development & Training Center

Body By X has the largest, commercial, infrared sauna in Southern Marin!

Infrared saunas have been proven to help with arthritis, detoxification, stress reduction, lowered blood pressure, weight loss, pain relief, improved circulation, psoriasis and other skin conditions, fibromyalgia and aging!

Recent research shows that increasing your core temperature for short periods, as is done by using a sauna, may offer dramatic improvements to your athletic performance. It does this using a concept called “hyperthermic conditioning”. It has multiiple positive effects on your body from increased endurance to the growth of new brain cells.

Email us @ info@getfitmarin.com if you have questions regarding our infrared sauna.


If you're considering introducing your son or daughter to training outside of his her sport please consider Body By X Skill Development & Training Center. Our trainers have years of experience successfully developing young athletes not just into better athletes but into young men and women who are stronger physically, mentally, and emotionally. We challenge them to grow on all levels. We teach them to respect themselves and others. We show them that exercise is a metaphor for life and we give them the discipline it takes to improve. We build well rounded student athletes. Our athletes learn to love exercise! Let Body By X help guide your young athlete on their journey.



As the global leader in whole body vibration technology, Power Plate redefines optimal health and wellness equipment for every age and ability.

Power Plates are engineered to apply the science behind the body’s natural response to destabilization. The Power Plate platform uses a consistent, safe and controlled level of vibration that moves in three directions (up and down, front and back, and side to side).

From rejuvenation and anti-aging treatments to rehabilitation and therapeutic massage, Power Plate provides exceptional results.

Whether you want to look better, feel better, or play better, Power Plate is the solution.

It’s not fiction—it’s science. More than 200 research studies conducted on whole body vibration have shown, when used regularly as part of a healthy lifestyle, Power Plate can help provide numerous wellness and fitness benefits, including:

Strength—   Improves muscle tone, builds explosive power and endurance.

Flexibility—   Increases range of motion, coordination, balance and stability.

Circulation—   Improves and increases blood flow to strengthen the cardiovascular system.

Weight Loss—   Reduces body fat and enhances metabolism.

Cellulite Reduction—   Diminishes the appearance of cellulite.

Alleviate Pain—   Promotes faster recovery of damaged muscles and tendons, decreases pain and improves joint function.


Fitness Classes

Fitness Classes

    Rhythm Ride with X - TRXtra - Rowing - Stretch to the Core - Aerial Fitness -
Aerial Play - Group X - Camp X - Fitness Rowing - T-Row-X - Buns & Bellies

Rhythm Ride With X

Indoor Cycling in Marin County

Are you ready to dance on a bike?  Xavier will take you on the ride of your life using the beat of the music and a kick ass stereo system to guide you!   You’ll ride the flats, do lots of mountain climbing and experience a range of speeds and resistance that will take you through all your training zones.  New to indoor cycling?  Don’t worry, this class is for EVERYONE.  The ONLY requirement is that you’re at least 4 foot 10.  You won’t want to take an indoor cycling class anywhere else after taking this one.  Seriously.  It’s that great.


TRX - Total Resistance Exercise

Straps.  Yep, straps.  Straps that provide a  full-body workout that will utilize your own body weight to help get you strong.  Created by a Bay Area ex-Navy Seal, these straps will kick your butt.  And if that’s not enough, the Xtra will having you stepping away from the straps long enough to use other aspects of the Center  to get that booty even stronger.   It's beginner-friendly but challenging enough for the fittest.  The best part.  Are you ready?  You determine how hard you want to go simply by changing the position of your body.  Nice for those days you’re feeling like a wimp and great for those days when you’re ready to conquer the world!


Fitness Rowing



An indoor rower provides a full body workout better than almost any other piece of exercise equipment. You control the effort of each stroke as you use the power of your major muscles to improve your cardio-conditioning. Indoor rowing builds cardio-endurance and muscular strength with a workout that tones and conditions your arms, quads, hamstrings, glutes and abs, all at the same time! New to rowing? No problem. We’ll start with the basics and move on from there. Experienced? We’ll review detailed rowing-stroke technique and good posture and form.  Get an all-around, non-impact, muscle-toning, endurance-building, fat-burning workout that can burn over 500 calories in less than 50 minutes.

Group X

New to strength training?  Never been to a gym?  Hate working out by yourself?  This class is for YOU!  It’s a small group-exercise program designed to help you gain strength, stability and flexibility.  Learn to use your own body weight, dumb bells, machines (yes those ugly gray pieces of equipment you’ve stared blindly at for years!) to get you in optimal shape.  You may even make some friends on your way to getting fit, woohoo!

Aerial Dance

Have you ever wondered what it’s like to dance in the air? Maybe you’ve seen Cirque du Soleil or the acrobats at the circus.  Now’s your chance to experience this beautiful art form in a safe and fun environment!  Aerial Dance is also a workout, an amazing way to get fit and gain strength and flexibility.  Think you’re not graceful?  No problem, you’ll learn that too!

Our Aerial Dance class uses a variety of aerial tools and you’ll be instructed and carefully guided on how to use them to create beautiful dance combinations. Come to Aerial Dance and you’ll be impressing your friends and family in no time.  Everyone welcome!

Viva La Yoga

Viva La Yoga is an all level mat flow class that focuses on full body flexibility, body awareness and strength. It will challenge you but the rewards are enormous.

A MUST take class for anyone who exercises.  If you don’t take this class, someday you won’t be able to take any class.  That’s really all there is to say.  Oh, one more thing.  You’ll feel like a brand new person when it’s over.



Only have an hour to workout?  Don’t want to choose between strength training and cardio?  T-R0w-X is the answer!  You’ll spend half your time on an indoor rowing machine and the other half on the TRX straps.  We’ll give you a few water breaks but you’ll be moving every body part for 1 hour.  Yep, that’s 60 minutes of strength training and cardio.  You know it will be the best hour of your day!  All ages and levels of ability welcome.  Come on…NO excuses!



Open Mon – Fri
5 am – 9 pm  
Sat, 5 am – 7 pm
Sun, 5 am – 7 pm

Non Member Hours-
Please call for an appointment


Open Mon – Fri
5 am – 9 pm  
Sat, 5 am – 7 pm
Sun, 5 am – 7 pm

Non Member Hours-
Please call for an appointment


Body By X

5768 Paradise Dr., Suite J
Corte Madera, CA 94925
Tel: (415) 945-9778


Mon-Fri, 5 am - 9 pm
Sat, 5 am - 7 pm
Sun, 5 am - 7 pm

Non Member Hours -
Please call for an appointment

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