ABOUT OPTIMUM FITNESS, WELLNESS & LIFESTYLE TRANSFORMATION
Optimum Fitness, Wellness & Lifestyle Transformation was founded in 2020 by Kristen McGregor and Camarsh Crumbie, two elite Jamaican athletes turned sports science–driven coaches with a shared vision: to deliver results-based fitness, rehabilitation, and wellness coaching grounded in real science not trends.
Kristen McGregor is a former track and field and rugby athlete, now a Professional Bodybuilder and National Champion, known for her expertise in body recomposition, strength training, and physique development. Camarsh Crumbie is a former top-ranked junior lawn tennis athlete, now a tennis coach and strength & conditioning specialist with a background in athletic performance and injury management. Together, they combine elite athletic experience with formal education in Sports Science and Athletic Training, creating a rare balance of performance, precision, and care.
At Optimum Fitness, we specialize in gut health optimization, belly fat reduction, body recomposition, injury rehabilitation, and athletic conditioning for both men and women. Our approach addresses the root causes of stubborn fat, poor recovery, and recurring injuries especially for clients dealing with protruding stomachs, hormonal stress, chronic pain, or post-injury limitations.
Our services extend beyond workouts.
Every client receives structured strength training, practical nutrition guidance, recovery support, and accountability, all tailored to their lifestyle and goals. With certifications in sports massage therapy and rehabilitation, Kristen and Camarsh integrate mobility, injury prevention, and recovery strategies into every program whether training in person in Kingston or online with international clients.
We work with:
- Individuals seeking sustainable fat loss and gut health improvement
- Clients focused on long-term body recomposition
- Athletes requiring tennis, football, and performance conditioning
- Clients recovering from or managing injuries such as herniated discs
Optimum Fitness offers a fully integrated service including Personal Training, Online Coaching, Athletic Strength & Conditioning, Tennis Coaching, Sports Massage Therapy, Injury Rehabilitation, and Nutrition Coaching.
Our mission is simple:
To help people move better, feel stronger, and achieve results they can maintain for life. As we continue to grow, our goal is to become one of Jamaica’s most trusted wellness brands while delivering world-class coaching to clients locally and internationally.
What People Say About US
Optimum Fitness team have helped me to achieve my fitness goals and have challenged me in ways that have helped me to grow physically and mentally in regard to weight lifting. Their program is a well-rounded program that deals with exercise, nutrition, and post-exercise care. They kept me accountable which helped me to achieve my goals in a timely manner. They’re both very knowledgeable of the field and work well together. 10/10 recommend optimum fitness for all your physical fitness needs. Remember it’s not just about training but other aspects play a very important role such as nutrition and stretching and this team provides that service.
client testimonial
Our Team
kristen mcgregor
CO-FOUNDER
- Bsc. Sports Science
- Sports Message Therapist
- 2022 PM Youth Awardee for Sports
- 2018 National Body Building Champ
- 2018 CAC Body Fitness Champion
- 2018 RJR Sports Woman of the Year
- 2020 Amateur Olympia Gold Medalist
- 2023 Olympian
- ISSA Master Trainer
Camarsh Crumbie
CO-FOUNDER
- Bsc. Sports Science
- Sports Massage Therapist
- Diploma in Fitness Instructing
- Diploma in Sport Massage Therapy
- ITF Certified Tennis Coach
- ISSA Master Trainer
- ITF & USPTR Level 1 Tennis Coach
What People Say About US
Optimum Fitness team have helped me to achieve my fitness goals and have challenged me in ways that have helped me to grow physically and mentally in regard to weight lifting. Their program is a well-rounded program that deals with exercise, nutrition, and post-exercise care. They kept me accountable which helped me to achieve my goals in a timely manner. They’re both very knowledgeable of the field and work well together. 10/10 recommend optimum fitness for all your physical fitness needs. Remember it’s not just about training but other aspects play a very important role such as nutrition and stretching and this team provides that service.
client testimonial
What People Say About us
Camarsh has been my personal tennis coach since early 2011 when I relocated to Kingston. He has been by far my preferred coach and “sometimes” fitness trainer and advisor on diet, exercise and injuries. Each session is fun but he pushes me whether through all court hitting or drills using a basket of balls. Has really advised well re techniques for improving strokes and I see and feel the difference. A motivating, respectful, reliable and honest gentleman who is considerate concerning the limitations of his client. I also note he has brought several children to a remarkable level of fitness and tennis. Each hour is invigorating and fun!
Dr. Michele Roofe
CLIENT TESTIMONIAL
What People Say About us
Camarsh has been my personal tennis coach since early 2011 when I relocated to Kingston. He has been by far my preferred coach and “sometimes” fitness trainer and advisor on diet, exercise and injuries. Each session is fun but he pushes me whether through all court hitting or drills using a basket of balls. Has really advised well re techniques for improving strokes and I see and feel the difference. A motivating, respectful, reliable and honest gentleman who is considerate concerning the limitations of his client. I also note he has brought several children to a remarkable level of fitness and tennis. Each hour is invigorating and fun!
Dr. Michele Roofe
CLIENT TESTIMONIAL
