Use it before or after your workout and enjoy the release of muscle tension. The Celsius Extra Firm Therapy Ball can be used for a wide variety of exercises to relieve stress and knots in your shoulders, feet, glutes, back and more. The highly compact design means it can easily be taken in your gym bag and become part of your regular training routine. Compact and portable design, easy to take with you to training sessions Penetrates deep into muscles to release knots and stress Rolls out muscles using your own body weight Wide variety of exercises can be used to target different parts of your body