Clinical Research Directory

Effects of Hamstring-Specific Training on Athletic Performance in Amateur and Professional Soccer Players

This randomized controlled trial aimed to investigate the effects of a 12-week hamstring-specific exercise protocol (HSEP) on athletic performance in professional and amateur male soccer players. A total of 144 soccer players participated in the study, including 72 professional and 72 amateur players. Participants were randomly assigned to four groups: professional training (n = 36), professional control (n = 36), amateur training (n = 36), and amateur control (n = 36). The intervention groups performed a structured hamstring-specific exercise protocol consisting of three bodyweight exercises: the Diver, Glider, and Single-Leg Hip Bridge. The program was implemented twice weekly for 12 weeks alongside regular soccer training. Training volume was progressively increased throughout the intervention period. The control groups continued their usual soccer training without performing the additional hamstring-specific exercise protocol. Athletic performance was assessed before and after the intervention using vertical jump and countermovement jump tests, the 30-15 Intermittent Fitness Test, one-repetition maximum squat and deadlift tests, eccentric hamstring strength measurements, and maximal sprint velocity assessments. The primary purpose of this study was to determine whether adding a structured hamstring strengthening program to regular soccer training improves physical performance and whether professional and amateur soccer players respond differently to the intervention. The findings may help physiotherapists, sports scientists, and strength and conditioning coaches better understand the role of hamstring-specific training in soccer performance.