Put that dumbbell down and listen up: muscles aren't everything. Your joints make your whole body tick but like any mechanical system...

Put that dumbbell down and listen up: muscles aren't everything. Your joints make your whole body tick but like any mechanical system...

Put that dumbbell down and listen up: muscles aren't everything. Your joints make your whole body tick but like any mechanical system...

Put that dumbbell down and listen up: muscles aren't everything. Your joints make your whole body tick but like any mechanical system...

Test 1: Toe touch. Stand with your feet together, knees locked. Hinge forward and reach for the floor. Your goal is to touch the floor...