About Ultra Fit

Four Decades Of Real Transformations

Ultra Fit started with one mission: to change lives through fitness. John DeFendis built the program in 1982 and has spent over 40 years proving that the right knowledge and the right coach change everything. Thousands of transformations later, that mission is stronger than ever.

Today Ultra Fit trains clients across the Upstate with directors and personal trainers in Greer, Greenville, Spartanburg, Anderson, and Simpsonville. Every program runs on the same proven method: torch weight, rebuild the body, and get real results. No cardio grind. No empty promises. Just a plan that works.

Smiling man in black shirt stands behind award plaques and trophies on round tables, with a gray backdrop.

Six people of varying ages working out and posing in gym settings, showcasing strength and fitness.

The Best Investment You’ll Ever Make

Hiring an Ultra Fit personal trainer is one of the best investments you can make for your health, your life, and your family’s future. Why Ultra Fit? Because we’ve got the KNOWLEDGE and the EXPERIENCE to guarantee your weight loss and body transformation EVERY TIME. Nobody else can say that. Nobody. We’ve got thousands of before and after testimonials, and no other training organization comes close.

Knowledge And Experience Change Everything

Without the right knowledge, you hit the gym day after day and make little to no progress. That’s the difference Ultra Fit brings. John created the program in 1982 and holds dozens of doctor endorsements dating from the 80s to today for his work in weight loss, health, and body transformation. Our program was even approved by the Congressional Medical Staff in Washington, DC when John was hired to train the Speaker of the House along with several Senators and Congressmen. This is a proven system, backed by real results.

A Story That Started With His Mother

John’s mission is personal. In 1968, his mother suffered the first of several heart attacks. Years later, armed with everything he’d learned about training and nutrition, John helped her lose nearly 180 pounds and transform her health. That experience revealed his purpose. Over 42 years, more than 700 Ultra Fit trainers have carried his program to tens of thousands of clients. He’s also coached over 600 champions in bodybuilding, figure, bikini, and physique competitions. His mother turns 91 this year, living proof of what this work can do.

Why Ultra Fit?

We bring the knowledge and the experience no other program can match, and the transformations prove it every single time:

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42 Years Of Proven Results

John built Ultra Fit in 1982 and has changed thousands of lives across the country since.

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Thousands Of Transformations

No other organization has our gallery of real before and after results. Nobody comes close.

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Featured On National TV

Our trainers and their outstanding results have appeared on nearly every major television show.

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Trusted By Doctors And Congress

Dozens of doctor endorsements, plus a program approved by the Congressional Medical Staff in DC.

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700-Plus Trainers Strong

Our trainers have carried this proven program to tens of thousands of clients over 42 years.

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A Coach Near You

With trainers across the Upstate, your Ultra Fit coach is ready right now.

Person doing dumbbell bench press on a gym bench, reflected in a mirror with another person taking a photo.

Real Client Wins

      EXCELLENT  
   Based on 39 reviews 
    
 
 
 
   
 
 
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   Laura Stauffer Parks 
 
 
 
 Trustindex verifies that the original source of the review is Google. Oh, Mario! You are absolutely the best trainer. Your sessions are so fun and I love your attitude and approach to training. Thank you for being so encouraging, positive, and kind while helping me become stronger, healthier and more resilient. When I count my blessings lately, you are one of them. Thank you!
  
 
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   Brandyn New 
 
 
 
 Trustindex verifies that the original source of the review is Google. Will is an absolute amazing trainer at Ultra Fit. He has been highly motivating for that extra effort.   Ever since I’ve been there he has more than exceeded my expectations with the training sessions. The body and mental transformations have been real. Will and Mike are very knowledgeable in their nutrition and weight training programs. I can’t say enough on how satisfied I am with the Ultra Fit training program.
  
 
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   Natalie Oglesbee 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mike is an amazing trainer and all the trainers are very encouraging and highly motivating. Nothing but positive feedback and results here! Highly recommend.
  
 
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   Brian Hagerty 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mike is an outstanding human being as his value system embodies his very existence.  Mike has influenced my sleeping habits,eating habits/dietary needs and workout routine. My body has lost 8 pounds of unnecessary baggage as well as embracing a ratio of body weight and body fat that is noticeable to most people.  Please give Mike an opportunity to help you manage your health.
  
 
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   Stephen Ross 
 
 
 
 Trustindex verifies that the original source of the review is Google. I signed up a few weeks ago for a 3x/week program. I’ve been working with Will Weaver & Mike. I’ve made a ton of progress in just a few weeks. My son has started asking to come as well. It’s been a long time since I’ve seriously lifted weights. And, I don’t progressively work up in weight when I’m on my own the way I do with Will.
Will keeps track of each workout and can tell me how far I’ve come each week in terms of the weight and reps I’m able to do.
  
 
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   Jamie Hawley 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can’t say enough good things about UltraFit and the environment they’ve created. From day one, everyone has been welcoming, supportive, and genuinely invested in helping clients succeed. It truly feels like a close-knit community where people care about your goals and your well-being.

I especially want to highlight my trainer, Kristi. She has been incredible to work with—not just in pushing me physically, but in understanding my individual needs and helping me work through them safely and effectively. I came in with some real health challenges, including episodes where I was at risk of blacking out, and she took that seriously from the start. She’s helped me build strength, stability, and confidence in a way that feels both challenging and safe.

What I appreciate most is how she knows exactly when to push me and when to meet me where I’m at. As I’ve gotten stronger, she’s adjusted my training to match, and the progress I’ve made in a relatively short amount of time has honestly surprised me. She pays attention, she listens, and she genuinely cares about her clients—not just their results, but their overall health.

If you’re looking for a place that’s supportive, professional, and truly focused on helping you improve, UltraFit is it. And if you have the chance to work with Kristi, you’ll be in excellent hands.
  
 
      Posted on Google  
   
   Michelle Usher 
 
 
 
 Trustindex verifies that the original source of the review is Google. The ultra fit team are dedicated and jordan is the best!
  
 
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   Kapil Chalil Madathil 
 
 
 
 Trustindex verifies that the original source of the review is Google. I’ve been training with Mike at Ultrafit Studio in Greer since September 2025, and it’s honestly been one of the best decisions I’ve made for my health.

Mike Rush is amazing — he really cares, pays attention to what you need, and knows exactly how to push you without overdoing it. Every session feels purposeful, and he keeps things motivating without it ever feeling overwhelming.

The studio itself has an amazing vibe—welcoming, focused, and never intimidating. You feel comfortable the moment you walk in.

If you’re thinking about getting started or looking for a trainer who truly invests in you, I highly recommend Mike and Ultrafit Studio.
  
 
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   Sylvia Holliday 
 
 
 
 Trustindex verifies that the original source of the review is Google. UltraFit Antrez is one of a kind. He is patient and full of answers. He was the best coach. I now feel confident in going to the gym alone and I know what to do with no anxiety. Go see UltraFit Antrez at the Greer location!