Sit on a stability ball with your feet flat on the floor. Extend one leg straight in front of you with your heel on the ground. Keep your back straight and hinge forward at the hips until you feel a stretch in the back of your thigh. Hold for 15–30 seconds, then return to the starting position and switch legs.
Log your exercise ball seated hamstring stretch sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.