Achilles tendinitis is an overuse injury of the band of tissue that connects calf muscles at the back of the lower leg to your heel bone, know as the Achilles tendon. While it is most common in runners, many people may experience Achilles tendonitis. Most cases can be treated with relatively simple care. This may include the use of certain medical equipment that can be found at One Bracing such as heel cups, night splints and compression supports