Skeletal muscle function does not differ between menstrual cycle phases: A prospective cohort study across three cycles

were observed for eccentric peak torque, total work, drop jump height, reactive strength index and relaxed muscle stiffness with varying directions of change; however, no phase-dependent pattern emerged. Estradiol concentrations did not vary significantly, whereas progesterone concentrations increased significantly during the mid-luteal phase. We concluded that skeletal muscle function appeared to be largely unaffected by menstrual cycle phases. Potential phase-related effects are likely minimal under real-life conditions.