Fitness Determinants of Repeated-Sprint Ability in Highly Trained Youth Football Players

Variations in rates of growth and development in young football players can influence relationships among various fitness qualities. Purpose: To investigate the relationships between repeated-sprint ability and other fundamental fitness qualities of acceleration, agility, explosive leg power, and aerobic conditioning through the age groups of U1 1 to U18 in highly trained junior football players. Methods: Male players ( n = 119) across the age...