Recommended by top sports physiotherapist Jon Cooke, who works with athletes and tennis players, this post-workout massage will help to release tension in tightened gluteal muscles. Sit on the floor, bend both knees and place your right foot on top of your left knee. Place the tennis ball under the left glute, towards the outside, and transfer all of your body weight onto it. Search for the tight and painful spots and stay on each spot, breathing deeply, until the tightness goes away. Roll around the entire glute area, until you don’t find any more knots, then switch sides.