With increased muscle strength, the ability of muscles to generate power increases during short-term, high-intensity activities, such as jumping and sprinting ( Özkan et al, 2012). For heavier subjects, this requires greater performance to overcome external resistance while performing exercises to achieve their athletic performance. With reduced anaerobic capacities, RPE at the end of the repeated sprint test are also much lower for normal weight children (Meckel, Nemet and Eliakim,