Can short bursts of intense running make young soccer stars faster and fitter?

This trial tests whether adding high-intensity interval training (HIIT) to regular soccer practice can improve fitness and sprinting in young male players. Twenty-four U19 players are split into two groups: one does extra HIIT sessions three times a week for eight weeks, while the other follows their usual routine. Researchers measure aerobic capacity, anaerobic power, sprint speed, and blood lactate levels before and after to see if the extra training makes a difference.