SOLESTAR cycling insoles are derived from state-of-the-art technology and from exhaustive field trials using cyclists from different disciplines and professional levels. A study, released by the German Sport University in Cologne in July 2011, showed that athletes using SOLESTAR insoles could achieve an average increase in performance of 6.9% during a sprint. For more information, please see: http://www.solestar.com/news/study-of-the-dshs-performance-increase/