Worldwide variation in the performance of children and adolescents: An analysis of 109 studies of the 20-m shuttle run test in 37 countries - Olds, T.; Tomkinson, G.; Leger, L.; Cazorla, G. (Journal of Sports Sciences, 2006)
Keywords: test; performance; performance development; child; youth; international; running; short-distance running; Great Britain; junior sports; training science