Recently, Nasirzade et al. (2013) demonstrated the relative contribution of different architectural parameters such as fascicle length and muscle thickness of vastuslateralis from different biomechanical, anthropometrical,and muscle architectural parameters in predicting 50-m
sprint front crawl swimming performance in young male swimmers. Although there has not been another study to examine these parameters in swimmers, the results of similar studies on athletes that required high muscle power production such as sprinting demonstrated that sprinters compared to endurance runners and untrained individuals have greater fascicle in their locomotor muscles