Region-dependent hamstrings activity in Nordic hamstring exercise and stiff-leg deadlift defined with high-density electromyography
| Autor: | Neil J. Cronin, Annamária Péter, András Hegyi, Taija Finni |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male medicine.medical_specialty Hamstring muscles Future studies QP301.H75_Physiology._Sport High density Physical Therapy Sports Therapy and Rehabilitation Hamstring Muscles Electromyography Biceps 03 medical and health sciences Young Adult electrical activity 0302 clinical medicine medicine Eccentric Humans Orthopedics and Sports Medicine ta315 Exercise voimanosto Hamstring injury medicine.diagnostic_test lihasaktiivisuus business.industry muscle function reidet 030229 sport sciences medicine.disease bi-articular hamstrings QP Athletic Injuries Physical therapy Exercise Test voimaharjoittelu business 030217 neurology & neurosurgery Hamstring |
| Zdroj: | Scandinavian Journal of Medicine and Science in Sports. 28(3):992-1000 |
| ISSN: | 0905-7188 |
| Popis: | Recent studies suggest region-specific metabolic activity in hamstring muscles during injury prevention exercises, but the neural representation of this phenomenon is unknown. The aim of this study was to examine whether regional differences are evident in the activity of biceps femoris long head (BFlh) and semitendinosus (ST) muscles during two common injury prevention exercises. Twelve male participants without a history of hamstring injury performed the Nordic hamstring exercise (NHE) and stiff-leg deadlift (SDL) while BFlh and ST activities were recorded with high-density electromyography (HD-EMG). Normalized activity was calculated from the distal, middle, and proximal regions in the eccentric phase of each exercise. In NHE, ST overall activity was substantially higher than in BFlh (d = 1.06 ± 0.45), compared to trivial differences between muscles in SDL (d = 0.19 ± 0.34). Regional differences were found in NHE for both muscles, with different proximal-distal patterns: The distal region showed the lowest activity level in ST (regional differences, d range = 0.55-1.41) but the highest activity level in BFlh (regional differences, d range = 0.38-1.25). In SDL, regional differences were smaller in both muscles (d range = 0.29-0.67 and 0.16-0.63 in ST and BFlh, respectively) than in NHE. The use of HD-EMG in hamstrings revealed heterogeneous hamstrings activity during typical injury prevention exercises. High-density EMG might be useful in future studies to provide a comprehensive overview of hamstring muscle activity in other exercises and high-injury risk tasks. peerReviewed |
| Databáze: | OpenAIRE |
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