Enhancing VO2Max: contrasting effects of fartlek training and small-sided games. - BAHTRA, RIDHO; ZELINO, RIO; BAFIRMAN; FAJRI, HADI PERY; VALENCIA, WILDER GEOVANNY; SUSANTO, NUGROHO; VICENTE GARCÍA-JIMÉNEZ, JOSÉ; PAVLOVIC, RATKO (Journal of Physical Education & Sport, 2024)