Acute effects of eccentric overload training with different loading doses in male sprinters

ObjectiveThe primary objective of this study was to investigate the immediate effects of two doses (Dose1 and Dose2,D1 and D2) of inertial Flywheel Eccentric Overload (FEOL), Eccentric Hook (EH), and High-intensity Half Squat (HHS) on muscle explosiveness in male sprinters.MethodsTwenty-one sub-elite male sprinters were randomly assigned to three groups: the FEOL group (n=7), the EH group (n=7), and the HSS group (n=7),Measurements of athletes' explosive jumps (CMJ, SJ, SLJ) heights, relative peak power indices, and 30-meter sprint times were collected before and 6 minutes after the intervention.ResultsAt D1 loading dose, CMJ, SJ jump height, and relative peak power increased significantly (p0.05). At D2 loading dose, CMJ, SJ jump height, and relative peak power increased significantly (p0.05). CMJ vertical jump height and relative peak power were significantly higher after D2FEOL and D2EH interventions than after D1HHS (P<0.05).ConclusionD1HHS, D2FEOL and D2EH3 intervention methods can all improve the performance of sub-elite athletes in the 30-meter test, CMJ test and SJ test. in the CMJ test, FEOL training demonstrated a higher acute augmentation effect compared to EH training.