Estimation of Muscle Strength in Women During the Different Phases of Menstrual Cycle
Journal Title: Journal of Medical Science And clinical Research - Year 2014, Vol 2, Issue 5
Abstract
In women, the menstrual cycle is associated with fluctuations in female sex hormones through thenormal 28-30 days cycle.There is a strong link between these fluctuating levels of hormones and their influence on muscle performance throughout the menstrual cycle.In present study, the muscle strength was estimated and compared during the 4 different phases of menstrual cycle in females of 18-40 years for 3 consecutive months. Material and Methods: Maximum Voluntary Contraction (MVC) indicator of muscle strength was estimated using Surface-Electromyography (S-EMG).It was measured and compared during F1(menses),F2(pre-ovulatory),L1(post-ovulatory) and L2(pre-menstrual) for 3 consecutive months.Results:The results showed statistically significant reduction in MVC during F1 and L2 phases when compared to F2 and L1 phases, during which the MVC was significantly increased. The level of significance was fixed at p < 0.05.Conclusion:The present study showed decline in muscle strength during F1 and L2 phases and relative better muscle strength in F2 and L1 phases. During the menses and premenstrual phase the estrogen levels are low when compared to high levels of estrogen with its two peaks occurring in pre and post ovulatory phases of menstrual cycle. Estrogen has a beneficial effect on muscle performance. Females are more prone to muscular injuries during those particular phases of menstrual cycle where there is a fall in estrogen levels. Hence, it should be a long term objective of clinicians, female athlete coaches and researchers to consider the factors that make women more susceptible to injuries during specific periods of menstrual cycle and consider changes in exercise and working modules to prevent these injuries and bring out the best performance.
Authors and Affiliations
Ayesha Juhi
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