same drills and workouts. The only measures of separation taken were by event category (i.e., throws, sprints, distance, horizontal jumps, and vertical jumps) or if athletes had conflicts with scheduled team practice times. Participants were recruited through personal contacts made possible through the
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Andrew Sortwell, Michael Newton, Daniel A. Marinho, Jorge Knijnik, and Rodrigo Ramirez-Campillo
countermovement and horizontal jumps ( Chaouachi, Hammami, et al., 2014 ). In more recent research by Lloyd, Radnor, et al. ( 2015 ), it was found that following 6 weeks of plyometric training in boys with a mean age of 12 years, there were significant improvements in squat jumping and hopping compared with a