If you hire this pro, you’re covered by a money-back guarantee. Learn more
If you hire this pro, you’re covered by a money-back guarantee. Learn more
About
I work closely with my clients and their families to elevate not just training, but their entire lifestyle. I take deeply rooted pride in being trusted inside their homes, their routines, their long-term health goals, and I’m honored when that trust grows into something that feels like family.
My background with a high-level concierge health and human performance startup in Philadelphia shaped everything about how I operate today—confidentiality, punctuality, time-efficiency, and results without excuses. We build anywhere. We optimize everything.
Today, I deliver orthopedic rehabilitation, performance training, and lifestyle optimization directly to you - privately, discreetly, and with uncompromising standards. This is the work I do best.
Overview
Hired 1 time
Serves Kaaawa, HI
Background checked
1 employee
1 year in business
Business hours
SunClosedMon5:00 am - 5:00 pm
Payment methods
This pro accepts payments via Apple Pay, Cash, Check, PayPal, Venmo, and Zelle.
Customers rated this pro highly for work quality, professionalism, and value.
Exceptional 5.0
19 reviews
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Read reviews that mention:
Cathy F.
Mar 23, 2026
In my 1 meeting with Jonyul 6 months ago, he taught me skills that have made a difference in my workout. A slight adjustment in stance alleviated chronic knee pain. He taught postures that help me not just exercise, but do it more effectively. He's intentional and listened to my needs.
Haley J.
Mar 20, 2026
Jonyull is an amazing coach. Fun, inspiring, excellent technique cues. Work well with individuals with all types of goals from longevity to strength to endurance training. Recommend him wholeheartedly!
SJ J.
Nov 30, 2025
Jonyull is incredible to work with, it was like having a physical therapist and a trainer all rolled in one! His knowledge of anatomy, physiology, exercise mechanics and recovery, along with injury prevention and rehabilitation is truly impressive. He created a program to help me rehab and strengthen a recurring ankle injury and, within weeks, I was able to do things I hadn’t been able to do since the original injury. He also designed a weight lifting program to compliment my cardio that was perfectly matched to my needs, abilities, and goals. Professional, encouraging, motivating, and all around incredible to work with. Can’t recommend highly enough!
Matthew S.
Dec 1, 2025
I worked with Coach Jonyull for around 2 months with the main goals of shedding some excess body fat, rebuilding strength, and addressing some hip and lower body asymmetries that have held back my squat progression. My results were better than expected, dropping around 10 pounds while making significant strength gains.
Through tailored mobility work, corrective exercises, and progressive strength programming, I am now back to confidently moving heavy weights on barbell squats again while feeling leaner, stronger, and more balanced overall.
Every session felt intentional, challenging, and tailored to my goals. He safely pushed me to new limits every workout. Can’t recommend Coach Jonyull enough if you want expert programming, knowledge, and attention to detail to get you closer to your goals!
Mark S.
Dec 1, 2025
I decided to train with Jonyull after my daughter emphasized his attention to detail. It was my first time back in the gym in quite a while, and I had several prior injuries and muscle imbalances.
Jonyull is amazing and enabled me to push myself hard in a safe manner. His attention to detail actually put my prior physical therapists to shame. He would notice small things, like if I picked up my heel or my knee drifted, and correct them immediately. His nutrition and recovery advice also helped me train harder with significantly reduced soreness. I wouldn't have neglected strength training for so long if I'd had someone like Jonyull earlier.
His value proposition: If you want to cheat on your workouts and have someone pander to you, he's definitely not your guy. But if you are ready to go on a fitness journey with a very knowledgeable, motivating, and engaging trainer, you should definitely consider Jonyull and discuss your situation and goals with him.
Credentials
Background Check
Jonyull Kosinski
FAQs
What should the customer know about your pricing (e.g., discounts, fees)?
Session pricing varies between 100-150/ hr depending on the program bought into! Let's chat about private, 1v1 and small group packages!
What is your typical process for working with a new customer?
Initial evaluation, intake and movement screening + workout then goal setting, nutrition analysis and lifestyle habits review!
What education and/or training do you have that relates to your work?
My primary background as a board certified athletic trainer (ATC) allows me to dive deep into your orthopedic/ sports rehab needs; my background in strength and conditioning allows me to dive into your body composition and fitness needs; both allow me to bridge the gap between the clinical + injury preventative work and your strength + longevity progressions!
