The Therapy in Motion, Spikey Ball Massage Roller Bar is a great way to self massage almost any area of the body. The bar consists of 4 spiked balls which help stimulate blood flow to ensure a safe and effective massage. The handles allow the user to precisely control the range of massage, helping to reduce muscle tension and tightness whilst helping to minimise the risk of injury. Injuries which can be prevented/alleviated include; achilles tendonitis, knee pain, ITB discomfort, hamstring pain and excessive tightness in the calf.