About FitFlex Training and our coaching approach

Marcus is a certified fitness professional with over 15 years of experience, including more than 10 years in leadership roles at corporate gyms. He holds a BS in Exercise Science and is passionate about health, family, and fitness. A proud husband, dad, and former bodybuilding competitor, Marcus brings both professional expertise and personal dedication to everything he does.

Shelby is a pro dancer and certified personal trainer from San Antonio, offering private dance and fitness sessions focused on control, confidence, and injury prevention. She helps clients move with purpose and reach their goals, on stage or in the gym.

With 15+ years in the health and wellness world, Keianna brings a unique blend of strength training, mobility work, and real, approachable coaching that meets you exactly where you are.

As a former teacher with a Master's in Counseling, she leads with empathy, clarity, and motivation that truly connects. Calm, confident, and community-driven, Keianna creates an uplifting space where every participant feels supported, encouraged, and capable of growth. Get ready to move smarter, get stronger, and feel your best, she's here to help you unlock it!