MacLellan G E, Vyvyan B
Br J Sports Med. 1981 Jun;15(2):117-21. doi: 10.1136/bjsm.15.2.117.
Soft tissue symptoms in the leg due to sporting activity are commonly associated with the force of heel strike. Conventional training shoes compromise between comfort and performance; few models are suitably designed for both considerations. Using a visco-elastic polymer insert the symptoms of heel pain and Achilles tendonitis have been largely or completely abolished in a preliminary study.