The hamstring pull will stretch out your hamstrings while giving you more strength and flexibility as a result. To do the hamstring stretch, maintain a sitting up position with a perfectly- aligned back and torso. Place both of your hands on one of your knees, with both palms resting on your hamstring. Lift the opposite leg slightly toward your chest, while maintaining the bent position. Repeat for 5-10 repetitions, and switch to the other side to do the same.