Therefore, as the recovery capacity of young athletes is better than in adults, especially from high-intensity exercise (Falk and Dotan,2006), one may hypothesize that brief (i.e. 30 s) interest rest between PT drills could be viewed as an adequate recovery period to induce training adaptations in this population, especially considering that a typical bounce drop jump takes less than 1 s of maximal effort, with a relatively low metabolic demand, which reduce the time needed to recover from the exercise (Balsom et al., 1992a;Chaouachi et al., 2011). Also, although long and short rest intervals may be equally efective, short inter-set rest may best accommodate the logistical constraints of the training sessions