How to do it: Stand up tall while holding onto a sturdy object like a chair, or rest your hands on a wall. Keeping your back straight and core tight, raise one leg up and lift it out to the side and away from your body, keeping your leg straight. Pause for one to two seconds, then return to the start position. That’s one rep. Repeat this movement, alternating sides each time.
Grade II (moderate): A larger tear in your muscle that makes it difficult to move and causes a moderate amount of pain, especially when you move the affected muscle, swelling, and tenderness. You may have 5 percent to 50 percent loss of function and you may be limping. You can't go back to sporting activities until the tear is completely healed. These injuries can take anywhere from a couple weeks to a few months to heal, depending on how bad they are.