Personal training in Gaithersburg that comes to you
Train with Jason Alfonso and the JB Athletics coaches at Supreme Athletics, in your home, at your office or online. Strength, mobility and recovery, programmed so you move better, feel better and keep doing what you love for decades.
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A family-first gym, in Jason's words
“Here at JB Athletics, we want you to be a part of our family, no matter where you are in your fitness journey.”Jason Alfonso, founder
See how sessions run, how Jason coaches, and the people you'd be training with. 42 seconds, with captions.
Book a free consultSix ways to train, one coaching standard
Pick the setting that fits your week. The programming, the form coaching and the accountability are the same in all of them.
In-home training
A coach comes to your home with the equipment. Built for busy professionals, golfers and pickleball players.
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Small group and semi-private
The energy of a class with a coach watching your form. Bring a partner for semi-private sessions.
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Corporate wellness
Training at your office fitness center, from group classes to one-on-one for leadership.
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Athletic training
Strength, speed, conditioning and mobility programmed for your sport, plus injury prevention.
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Online coaching
Weekly workouts in the JB Athletics app, regular check-ins and optional nutrition guidance.
Learn more →One-on-one at Supreme Athletics
Private sessions at 8648 Dakota Dr in Gaithersburg. A plan built on your goals, fitness level and health history, coached rep by rep.
Book a free consult →Built for people who want to stay strong for the long run
Fitness has moved on from how much you can lift. What matters is how well you move, how strong you feel and how long you keep it. That is what we train for.
Golfers and pickleball players
Rotation, hip mobility and strength that protect your back and add to your game. Many of our in-home clients play on the weekend.
Busy parents
Deadlifts in the gym so you can pick up your kid without a second thought. More energy at the end of the day, in less time.
Executives and teams
Sessions that come to your office or your home so training fits around meetings, not the other way round.
Athletes
Sport-specific strength, conditioning and mobility, with guidance on nutrition and injury prevention on and off the field.
Our method is called FOCUS
- Movement patterns that carry over to real life, from the golf course to the school run.
- Recovery built in, with foam rolling, myofascial work and mobility at every stage.
- A simple roadmap tailored to your goals, explained so you understand every exercise and the muscles it trains.
Move better, feel better, look better. It's the JB way.
Meet the coaches
From first call to first session
Free consult
Tell us your goals and your schedule. Jason asks about your fitness level, your health history and any injuries.
Your plan
We recommend where and how often to train, and build a program around you. No two plans are the same.
Train and check in
Coached sessions, a reminder the day before each one, and regular check-ins so you keep moving forward.
What our clients say
“Training with you has literally changed my life. When I came in here, I was lifting like 110 on a good day. And we just finished 12 sets of 185.”
“I'm confident that Jason can help you achieve what you don't think is possible. At the age of 38 I'm the healthiest I've ever been, and I have Jason to thank for that.”
“I've been working with Jason for a year and a half now. I'm in better shape now than I was 10 years ago. He makes things fun and keeps you accountable.”
“The biggest take away from working out with Jason is I feel confident I have the knowledge to continue exercising on my own.”
Questions people ask before they start
Where do sessions take place?
Wherever suits you. In-gym sessions are at Supreme Athletics, 8648 Dakota Dr in Gaithersburg. A JB Athletics coach can also come to your home, run sessions at your office fitness center, or coach you online through the JB Athletics app.
Do I need to be in shape before I start?
No. Every program is built around your current fitness level, your health history and your goals, whether you are coming back from years off or training for a season.
How much does personal training cost?
Small group training is $25 for a drop-in or $120 a month for unlimited classes. One-on-one, in-home, athletic and corporate training are priced as packages, and Jason will walk you through the options on your free consult.
What is the free consult?
A conversation with Jason about what you want from training, how you move today, and any injuries or limits. You leave with a recommendation for the right program. There is no cost and no commitment.
Who will be my coach?
JB Athletics was founded by Jason Alfonso, who specializes in functional sports performance and myofascial recovery. He coaches alongside Coach Joe.
What are your hours?
Sessions run Monday to Friday from 5:30 am to 6:00 pm, and Saturday from 9:00 am to 11:00 am.
Book your free consult
Answer four quick questions and Jason will reach out to set up your free consult. You'll see which program we'd start you on before you finish.
- 240-474-0544Prefer to talk? Call us
- thejbathletics@gmail.comEmail
- Supreme Athletics, 8648 Dakota Dr, Gaithersburg, MD 20877In-gym sessions
| Monday to Friday | 5:30 am to 6:00 pm |
| Saturday | 9:00 am to 11:00 am |
| Sunday | Closed |
What do you want training to do for you?
Free, no payment, no commitment.