Index of mechanical efficiency in competitive and recreational long distance runners - McBride, J. M.; Davis, J. A.; Alley, J. R.; Knorr, D. P.; Goodman, C. L.; Snyder, J. G.; Battista, R. A. (Journal of Sports Sciences, 2015)
Keywords: long distance running; efficiency; sparetime sports; elite sport; running economy; Great Britain; endurance sports