Internal, external and repeated-sprint demands in small-sided games: A comparison between bouts and age groups in elite youth soccer players - Hauer, R.; Störchle, P.; Karsten, B.; Tschan, H.; Baca, A. (PLOS ONE, 2021)
Keywords: soccer; junior elite sport; load; heart rate; velocity; load range; playing field; USA; sport games; junior sports