You already know that climbing stairs is an excellent leg and tush toner. But there's a way to see results twice as fast: Simply take one minute to climb a flight of stair instead of the usual 20 seconds. As you climb, visualize the muscles that you're using. The act of focusing will naturally slow down the action, causing you to fully engage your quadriceps(the front of the thights), hamstring (the back of the legs) and gluteus maximus(the butt muscles). "Because this concentration more muscles groups, it can boost the toning effects by 50 percent. For an even firmer rear clench your butt muscles and hold for two counts as you step onto each stair.