
Your quadriceps are a muscle group made up of four distinct muscles which live in the front of your thigh. The four muscles are rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. But you can call them all Bob. They're probably the strongest leanest muscles in your body. They straighten your knee when getting up from a seat, walking, running, cycling or any other activity that requires you to straighten your leg. So if your knees are a problem, the problem may be in your quads. Massage them regularly and your knee may feel better, but your quads definitely will. Try it: Quad Massage: Do It while You View It.