BIA GPS Hooper index Humanities Loughborough Intermittent Shuttle Test RPE RSA test Social interaction Yo-Yo Intermittent Recovery Test level 1 ability-to-change-direction acceleration additional weight adolescents anaerobic performance arm span association football asymmetry athletes assessment athletic performance autonomic nervous system balance ball throwing beach handball body symmetry cardiac autonomic change of direction ability correlation counter movement jump countermovement jump deceleration