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Estrogen Source Influences Muscle Soreness and Recovery in Young Women

100 contractions of maximally tolerated neuromuscular electrical stimulation (NMES) were performed on one quadriceps. The oral contraceptive (OC) group, consuming an exogenous estrogen source, performed NMES between days 8‐11 of pill consumption. The high (HI) and low (LO) endogenous estrogen groups performed NMES between days 19‐21 or 1‐3 of the menstrual cycle, respectively; day 1 was menses onset. HI and LO did not take OC. Maximal voluntary isometric contraction (MVIC) was assessed before, 0, and 48 hours post. Soreness was measured before and 48 hours post with a 7‐point and 10‐point Likert Scale of Muscle Soreness for Lower Limb (LSMSLL) and a 100 mm visual analog scale (VAS). Maximum and average Rating of Perceived Exertion (RPE) and Pain were reported for the NMES bout.