–Welcome to our Teen Team Athletic Training Program!  Here at Grind Heart Fitness our philosophy of training is based on 5 core principles that allow for precise, year- round training, and will develop each individual into the best athlete possible. Our program is based on the progressive overload principle which states that the body adapts to physical stresses by becoming stronger. Athletes will improve in strength by slowly and periodically adding resistance to the body so that speed, agility, plyometrics, and sport specific movements are improved and mastered.  Call or email us for more information 404-219-6073/info@grindheart.com