OBJECTIVES: To determine changes in neuromuscular performance throughout the menstrual cycle in females aged 18-25.
METHODS: Fifty physically active college females (25 on oral contraceptives (OC)) were recruited to participate. Data collection visits coincided with early-follicular (Fp), ovulatory (Op), and the mid-luteal (Lp) phases. Isokinetic peak torque at the knee (IPT) was measured at 60°/sec, 180°/sec, and 300°/sec. Grip force was measured using a handheld dynamometer. Plasma estradiol and progesterone confirmed menstrual cycle and serum relaxin was screened as a potential covariate.
RESULTS: Grip strength was lower during Fp (30.1±0.7kg) than during Op (31.5±0.7 kg, p=0.003) and Lp (32.6±0.7 kg, p
CONCLUSIONS: Results indicate that muscular performance is diminished during Fp and the lack of group-by-phase interaction indicates that this effect is not hormone-related. These data indicate that females may be at a greater risk of injury due to decreased strength during Fp than other phases of their cycle.
Journal of Musculoskeletal & Neuronal Interactions
Copyright © the Authors
Weidauer, Lee A.; Zwart, Mary Beth; Clapper, Jeffrey A.; Albert, Joe; Vukovich, Matthew; and Specker, Bonny, "Neuromuscular Performance Changes Throughout the Menstrual Cycle in Physically Active Females" (2020). Ethel Austin Martin Program Publications. 119.
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