“…These characteristics can be directly influenced by the age of the participant as children possess less voluntary muscle speed, strength, and power, even when corrected for age or maturation state (Van Praagh & Dore, 2002). Likewise, children and adolescents possess less quantity of type II muscle fibres in the vastus lateralis muscle compared to adults (Lexell, Sjöström, Nordlund, & Taylor, 1992;Sjöström, Lexell, & Downham, 1992) and have a reduced ability to utilise these higher-threshold motor units (Cohen et al, 2010;Dotan et al, 2012) which are more responsive to heavy resistance exercise (Hamada, Sale, MacDougall, & Tarnopolsky, 2000;Howarth & Kravitz, 2008). The combination of these factors may influence the ability of adolescent participants to derive benefits from heavy resistance exercise.…”