Gymmerz – Gym Powerpoint Template
https://elements.envato.com/gymmerz-gym-powerpoint-template-J9TUH3A
Free 
ShapeUp – Gym Powerpoint Template
https://elements.envato.com/shapeup-gym-powerpoint-template-MM46KMW
Free 
Fitnesi – Fitness Powerpoint Template
https://elements.envato.com/fitnesi-fitness-powerpoint-template-R2P4KYS
Free