Our Coaches
The Marietta Comets coaching staff has over 19 years and 12 years of individual experience between our two coaches. They have both done exceptionally well in their track and field careers being able to represent their countries at the international level. Coach Nyles has represented the Bahamas, while Coach Maria is currently representing Dominica.
Coach Nyles Stuart
Coaching Experience:
Nyles' specialties are both track and field and strength training development"
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18 years of coaching starting as an Assistant Coach at Southern Illinois University.
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Assistant coach at Rend Lake Community College. Highlights, coached 3 athletes to NJCAA All-American status.
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Life University Women's Head Coach: 2017 to 2021
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Developed over (30) high school state qualifiers in the Metro Atlanta Area.
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Produced 15 state champions in the sprints and jumps disciplines.
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2 High School All-Americans.
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1 NAIA two time national champion; women's triple jump.
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1 Bahamas National Long Jump Champion 2018
Education & Certifications include:
B. S. Human Nutrition & Dietetics
USATF Level I Coach
NASM Trainer
Coach Sheila Porter
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Hi, I’m Sheila Porter, Certified Personal Trainer (NASM), educator, mother of three, and coach here at MPT. Before I ever stepped into this role, I lived the same challenges so many adults face: juggling work, family, and responsibilities while trying to squeeze in a workout whenever I “found the time.”
For years, I tried to stay active on my own, but life always seemed to get in the way. I told myself I’d restart my fitness routine tomorrow… and tomorrow… and tomorrow. Sound familiar?
Everything changed in 2022 when I made one decision that transformed my life—I hired a personal trainer. That accountability, structure, and support were exactly what I needed to break the cycle. The physical gains were great, but the real transformation was internal: I rediscovered my strength, my resilience, and my confidence. I felt in control of my story again.
And now, at Marietta Performance Training, I help other adults experience that same shift.
Whether you’re just beginning your fitness journey, getting back in shape after time away, or strengthening your body to feel better in your day-to-day life, you deserve a space that meets you where you are and helps you move forward—step by step.
At MPT, you’ll get:
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Personalized training plans tailored to your goals, pace, and lifestyle
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Supportive coaching that meets you with encouragement, not judgment
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A welcoming, adult-focused environment designed to help you feel capable, motivated, and proud of your progress
It is never too late to start taking care of yourself.
You deserve to feel strong, energized, and confident in your body—and we’re here to help you get there.
Welcome to Marietta Performance Training.
Let’s rebuild your strength. Let’s rewrite your story.