Whether you’re a runner, a weight lifter, or a living-room-workout-when-I-can girl, at some point or another, your hamstrings have been tight. Tight hamstrings can make your hips, lower back, and even your knees hurt.
Your hamstrings are the muscles in the back of your thighs. Each leg has 4 hamstrings. These muscles are responsible for flexing your knees. (Stand on your right leg and put your hand on the hamstrings of your left leg. Bring the left heel up toward your butt and let it back down slowly. As you do, you’ll feel the hamstring working.)
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