Men and women show different adaptations of quadriceps activity following fatiguing contractions: An explanation for the increased incidence of sports-related knee injuries in women?
| Autor: | Deborah Falla, Nosratollah Hedayatpour, Zahra Izanloo, Hadi Seylaneh, Diyar Mohammed Sediq Rashid |
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| Rok vydání: | 2020 |
| Předmět: |
Adult
Male medicine.medical_specialty Contraction (grammar) Vastus medialis Vastus lateralis muscle Biophysics Neuroscience (miscellaneous) Isometric exercise Electromyography Knee Injuries Knee extension Quadriceps Muscle 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Sex Factors Isometric Contraction medicine Humans Knee medicine.diagnostic_test business.industry Incidence (epidemiology) 030229 sport sciences Adaptation Physiological Athletic Injuries Muscle Fatigue Female Neurology (clinical) Knee injuries business 030217 neurology & neurosurgery |
| Zdroj: | Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology. 58 |
| ISSN: | 1873-5711 |
| Popis: | We investigated whether adaptations of quadriceps muscle activity to fatiguing exercise differs between sexes. Fifteen healthy men (age, mean ± SD; 22. ± 2.4 yr, body mass 70.5 ± 11.4 kg, height 1.72 ± 0.06 m) and 15 healthy women (age, mean ± SD; 21 ± 1.8 yr, body mass 60 ± 7.5 kg, height 1.62 ± 0.07 m), all right leg dominant, participated in the study. Participants performed a submaximal isometric knee extension contraction at 50% of the maximum voluntary contraction (MVC) sustained until task failure before and after a fatiguing exercise. Surface electromyography (EMG) was simultaneously recorded from nine regions distributed over the medial, middle and lateral locations of the quadriceps muscles in a longitudinal direction corresponding to the vastus medialis, rectus femoris (RF) and vastus lateralis muscle, respectively. A significant reduction in maximal force and time to task failure were observed after fatiguing exercise for both sexes (P 0.001). However, women displayed greater myoelectric manifestations of fatigue specifically for the RF during the post-fatigue sustained contraction (P 0.05). The RF is more susceptible to fatiguing exercise in women compared to men which may partly explain the higher risk of knee injuries among female athletes during competitive sports. |
| Databáze: | OpenAIRE |
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