How to do it: Begin with a 20- to 30-inch box or bench right behind you. Straighten one leg and lift your foot in front of you, bend your standing leg, and push your hips back as far as possible as if you’re squatting on two legs, but just doing it on one. Continue until your butt hits the bench, pause, then squeeze your glutes and drive through your planted heel to stand up. Do not relax and release the tension in your muscles as you sit. Repeat this movement, alternating sides each time. (Once you master lowering to touch your glutes to the bench, lower the bench or try lowering to the floor.)
I am a science writer, former massage therapist, and I was the assistant editor at ScienceBasedMedicine.org for several years. I have had my share of injuries and pain challenges as a runner and ultimate player. My wife and I live in downtown Vancouver, Canada. See my full bio and qualifications, or my blog, Writerly. You might run into me on Facebook or Twitter.
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.