Eccentric training effects on hamstring muscles in oral contraceptive users and naturally menstruating women.

ABSTRACT:

Purpose

This study evaluated the effects of eccentric resistance training on hamstring muscles properties in women using oral contraceptives (OC) and naturally menstruating women.

Methods

Before and after the training intervention, we measured maximal isometric and eccentric moment of the knee flexor muscles, thickness and shear wave velocity (SWV) of the biceps femoris long head (BFlh), semitendinosus (ST) and semimembranosus (SM) muscles, and BFlh fascicle length using ultrasonography and dynamometry.

Results

The 12-week training intervention resulted in a modest but statistically significant increase in resting BFlh fascicle length (~2% on average, p = 0.005) across both groups, with no observed effect of OC use on any variable. The muscle strength and thickness in

SUBMITTER: Seynnes O 

PROVIDER: S-EPMC12354606 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature