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  • Everchange Fitness
  • Claim your natural fitness

Pilates & Personal Training with Jeri Jirsa

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Workout choices

Body Mechanix is located at 1074 Folsom Street, San Francisco, CA 94107.

Booty by Jeri

This resistance workout and Pilates fusion class is designed to help you make the best of your time! Receive a full-body workout to get your body going, then transition into Pilates to challenge your core, stretch your muscles, and enhance control. Use TRX, resistance bands, Kettlebells, free weights and your own body to be ready to tackle the activities you love to do. Get your own Booty by Jeri– you’ll love the way you look and feel!

Sign up for Booty by Jeri.

Fit to Ride

As a cyclist, I know just how important it is for us to train our bodies off the bikes as well as on them! Especially during winter months, that conditioning becomes even more crucial.

In Fit to Ride, you will:
*Perform exercises that will help take the load off your knees, and address many common ankle/knee/hip concerns that cyclists face.
*Train your core stability and torso rotation to handle the demands of the bike, keeping that lower back pain away.
*Strengthen your arms and shoulders in a way that will allow you to experience less residual post-ride stress.
*Learn exercise modifications that will make the workout as challenging or accessible as your body needs.
*Develop active flexibility to keep your body ready to react when the road throws surprises your way.

Sign up for Fit to Ride.

25% of all Fit to Ride proceeds will be donated to the 2015 AIDS Life/Cycle charity. To learn more about it and follow my story, visit

From Zero to Hero

Are you unfamiliar with working out, or haven’t had a regular exercise routine in… well, FAR too long? Come in and have fun with an experienced and understanding trainer who helps you learn what is best for you! Begin with movement fundamentals and progress at your own pace. This class focuses on weight loss, strength building, toning, nutrition, and camaraderie. Use free weights, TRX, mini-bands, medicine balls and Pilates exercises. Become familiar with a variety of movements and exercises in a supportive and encouraging environment.

Sign up for Zero to Hero.

Pilates to Go

Make some time in your week for Pilates to Go! This 45-minute Pilates-fusion class is designed to get your butt out of your chair and get moving. Bring a water bottle and get your core burning. This light-intensity class is suitable for beginning to intermediate levels and is designed to get you back to the office feeling energized and refreshed.

Sign up for Pilates to Go.

Body Mechanix is located at 1074 Folsom Street, San Francisco, CA 94107.

Intro Session

Step One: We will spend the first few minutes discussing your history, goals, and learning how we will work together. Step Two: We will take some measurements to asses your body composition assessment. Step Three: A light 30-minute workout designed show me how you move so I may best design your programming.

Sign up for your Intro Session.

Personal (One-on-One) Training

One-on-One personal fitness training. May include free weights, TRX, Pilates, or other functional movement.

Sign up for Personal Training.

Duet (Two-on-One) Training

Train with a friend, coworker, or significant other. May include free weights, TRX, Pilates, or other functional movement.

Sign up for Duet Training.


A quick, personalized workout designed to hit all major areas of the body. May include free weights, TRX, Pilates, or other functional movement.

Sign up for Timesaver Training.

EHS Pilates is located at 1452 Valencia St, San Francisco, CA 94110.

Personal Pilates (One-on-One) Training

One-on-One Pilates training. May include mat/reformer/springboard.

Sign up for Personal Pilates.

Duet (Two-on-One) Pilates Training

Train with a friend, coworker, or significant other. May include mat/reformer/springboard.

Sign up for Duet Pilates.

About Jeri Jirsa & Everchange Fitness

I'm Jeri Jirsa. I'm 5'3`` and used to weigh almost 200 lbs. I now weigh 125 and am stronger, healthier and more fit than ever! I did it — I can help you, too!

I grew up riding horses and engaging in activities such as hiking and mountain biking. I didn’t participate in traditional exercise programs, finding that I didn’t enjoy the sports experience. After graduating from college, getting married and taking a desk job, I went from my teenage weight of 135 up to 198 pounds. Knowing there is a family history of diabetes and stress-related heart problems, I knew I couldn’t continue that way.

My husband and I joined a gym, signing up for the personal training that was offered. We found that the experience wasn’t enjoyable, as we came from our desk jobs sitting at work to sitting at machines. To put it simply, we were bored. Unsurprisingly, we dropped out of our training programs, and spent the next few years trying to find ways to exercise at home and on our own.

I began taking martial arts in 2003, and found that slowly I was beginning to get healthy and fit. I was starting to feel in shape. As I progressed through the belts and became more fit, I started working with beginning martial arts students. Between 2003-2007, I lost 50 pounds. Then life changed again, and I could no longer continue my training.

The resulting transition found my weight rising back up. I realized I needed to not just make a temporary change, but make fitness a permanent part of my lifestyle. I began pole fitness training July of 2009, and found the exercise that I truly enjoyed, as well as being highly physically demanding. By October of 2010, I was down to 128 pounds, in the best shape of my life, and helping instruct pole students.

I took my new-found fitness passion and left the office world. I became a full-time personal trainer in March, 2011. Everchange Fitness began in February, 2012 as the realisation of a dream to help people appreciate what they can accomplish, and to take control of their own health.

Everchange Fitness - A New, Vibrant me

The Transformation - Then


Me in 2002 – 198 lbs

Everchange Fitness - Jeri before

Me in 2009 – 180 lbs

The Transformation - Now

Everchange Fitness - Jeri after

Radical Transformation!

Everchange Fitness - Jeri after

I feel and look GREAT!

Get in touch

I'll get back to you within 24 hours (and feel free to call if you need a faster response).

(415) 690-7196

1074 Folsom St • San Francisco