Age appropriate Athletic Development is hard to come by in the Cedar Rapids/ Corridor area. Realizing this need Kosama-CR developed K-Performance last October; our age appropriate program with guaranteed results. At K-Performance we work with individuals, teams of all ages and sports (runners, bikers, mud runs). You want to get better at what you do, K-Performance has it all from sports to personal training; with K-performance there is no Off Season!