French Contrast Training Can Improve Sprint Performance in Elite Male Youth Soccer Players Compared to Conventional Strength Training

This study examined the effects of 14 weeks of French Contrast Training (FCT) versus conventional strength training on athletic performance and neuromuscular characteristics in elite youth soccer players. Twenty-three elite male U19 soccer players were assigned to either an FCT group (FCTG) or a control group (CON) that performed conventional strength training (CON). Subjects underwent pre-, mid-, and post-training testing, including a 30-meter sprint, Countermovement Jump, Broad Jump and Drop Jump. Dynamic strength was assessed as estimated one-repetition maximum Trap Bar Deadlift, whereas isometric strength was assessed as Maximal Voluntary Contraction force and Peak Rate of Force Development in Isometric Mid-Thigh Pull. The significance level was set at p ≤ .05. The FCTG demonstrated significant improvements in 5 m, 10 m, and 30 m sprint times (9.43%, 4.49%, and 2.58%, respectively), whereas the CON showed no improvement. A group × time interaction favored the FCTG at 5 m (p = .02) and 25 m (p = .03). Both groups showed comparable improvements in maximal dynamic strength, maximal isometric strength, Reactive Strength Index (RSI),) and drop jump height (DJH). However, greater improvements in the peak rate of force development were observed following FCT. French Contrast training elicited superior improvements in sprint performance and rate of force development compared with conventional strength training, despite similar gains in maximal strength. These findings suggest that French Contrast training may be an effective strategy for enhancing sprint-related performance in elite youth soccer players.