J King Performance
J King Performance

J King Performance

$200
Estimated price


Training location

Responds in about 2 hours


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Introduction
Ready to learn how to defend yourself? Whether your goal is to lose weight, gain muscle, boost your fitness or become healthier—I’ll help get you there. Now sitting at 6'5" and 225 lbs, I’ve been the skinniest guy in the room, the chunky guy and the least equipped to defend himself at different times in my life. At 34 years old I now have a 10-0 fight record, over 10 years of experience in Muay Thai, Strength & Conditioning Training and Fitness. I design tailor-made plans for each individual geared towards multiple goals: - Traditional Muay Thai, Boxing and Self-Defense - Weightloss - Muscle Gain - Strength and Fitness NOW OFFERING WEEKLY CLASSES – ASK FOR DETAILS Whether you’re just starting out or looking to level up, our Muay Thai classes are designed to be accessible for all budgets. We believe everyone should have the chance to train, grow, and feel confident—without breaking the bank. Private group sessions are also available, and I offer customized Muay Thai camps for companies, schools, or teams. As your coach, I’ll guide you through every step—building your ideal body, improving your fighting ability, and boosting your confidence. We focus on one habit at a time so progress feels natural and lasting. NASM Certified Personal Trainer 10-0 Fight Record | National, State & World Classic Champion Shoot me a message to book a half-priced intro private session to see if we're the right fit.
Overview

Hired 27 times

Serves San Francisco, CA

Background checked

2 employees

10 years in business

Business hours

This pro hasn't listed their business hours.

Payment methods

This pro accepts payments via Apple Pay, Cash, Venmo, and Zelle.

Social media

Instagram

Projects and media

37 photos

Projects and media

37 photos

Specialties
Fitness goals

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Event to prep for

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Medical concerns

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Reviews

Customers rated this pro highly for work quality, professionalism, and value.

Exceptional 5.0

50 reviews

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pro avatar
Brittany R.
May 19, 2025
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Hired on Thumbtack

Hired on Thumbtack

I’ve been working out with Jack for some time now and I’ve learned quite a bit. My technique has improved significantly. I feel like my sessions are always customized and he’s always prepared. They’ve definitely progressed over time and a lot of the combinations became more natural with repetition. I’ve also started to figure out which areas I need to improve in my mobility to aide in my training from the critiques mid-session in addition to accountability that has helped my weight loss. I’ve learned skills that I do find valuable for self-defense. I find that his training is repeatable when you want to self train between sessions. I’ve definitely progressed and gained confidence over the last six months that we’ve trained together and I would highly recommend him. I think that Jack trains is not just as a fighter / trainer but as a friend and I’ve learned a lot of mental techniques as well that have help beyond just Muay Thai, which I have significantly enjoyed.
Private Self Defense Lessons
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Amanda S.
Apr 6, 2025
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Hired on Thumbtack

Hired on Thumbtack

Training with Coach Jack for the past three months has truly changed my life. He creates such a safe, supportive environment that makes you feel empowered every step of the way. I’m so grateful to be learning from someone who brings so much heart to the job. I’m also now attending the class he teaches, Coach Jack’s class has been a great opportunity to join a community and learn alongside with others. His patience and encouragement with the class is genuine motivating.
Private Self Defense Lessons
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Carley P.
Feb 5, 2025
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Hired on Thumbtack

Hired on Thumbtack

I’ve been training with Jack for a few months, and I can honestly say it’s been an incredible experience. Each session is not only fun but also packed with useful, hands-on knowledge. Whether you're a beginner or more advanced, Jack tailors each class to meet your needs, always ensuring you’re learning something new. His expertise in Muay Thai is evident in every technique he teaches, and he’s a fantastic communicator. He breaks things down in a way that makes even the most complex movements feel accessible. Beyond just the technical side, his passion for the sport is contagious, and it keeps me motivated to push myself every class. Every class leaves me feeling stronger, more confident, and excited to continue learning. If you’re looking for a trainer who combines expertise, patience, and a genuine love for Muay Thai, I highly recommend Jack.
Private Self Defense Lessons
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Hazar Y.
Jan 5, 2025
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Hired on Thumbtack

Hired on Thumbtack

Training with Coach Jack has been an incredible experience! His ability to explain techniques clearly and tailor his coaching to my skill level has helped me improve so much. He’s supportive, motivating, and always pushes me to do my best. Every session is challenging, but I leave feeling stronger and more confident. If you’re serious about Muay Thai, I can’t recommend Jack enough!
Private Self Defense Lessons
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Yesenia S.
Mar 28, 2025
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Hired on Thumbtack

Hired on Thumbtack

Jack and his lovely crew(Wen and Roman) came to our Highschool and ran a 2 week Muay Thai boot camp for me(a teacher) and a few students. We are all walking away from the experience thankful, skilled, and empowered. I personally doubted my ability at the start of this boot camp due to my experience of sloppy footwork when it came to dancing. Jack was able to listen to my mental block, acknowledge it and work through it with me. I can confidentially say I feel proud of my footwork and I realize that I indeed can do the moves despite my imagined fears. I can demonstrate Muay Thai moves to my family and students now after this experience. My confidence is generally higher now, and I have a newfound interest for watching fights in the ring. I have developed a love for Muay Thai that I didn’t think was possible until Jack agreed to run this boot camp for our school. I can also say Jack is excellent with youth, kind and also fun! Forever grateful.
Private Self Defense Lessons
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Jack Kerr