Reduced biceps femoris myoelectrical activity influences eccentric knee flexor weakness after repeat sprint running
Journal article
Timmins, R. G., Opar, D. A., Williams, M. D., Schache, A. G., Dear, N. M. and Shield, A. J.. (2014). Reduced biceps femoris myoelectrical activity influences eccentric knee flexor weakness after repeat sprint running. Scandinavian Journal of Medicine & Science in Sports. 24(4), pp. e299-e305. https://doi.org/10.1111/sms.12171
Authors | Timmins, R. G., Opar, D. A., Williams, M. D., Schache, A. G., Dear, N. M. and Shield, A. J. |
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Abstract | The aim of this study was to determine whether declines in knee flexor strength following overground repeat sprints were related to changes in hamstrings myoelectrical activity. Seventeen recreationally active men completed maximal isokinetic concentric and eccentric knee flexor strength assessments at 180°/s before and after repeat sprint running. Myoelectrical activity of the biceps femoris (BF) and medial hamstrings (MHs) was measured during all isokinetic contractions. Repeated measures mixed model [fixed factors = time (pre- and post-repeat sprint) and leg (dominant and nondominant), random factor = participants] design was fitted with the restricted maximal likelihood method. Repeat sprint running resulted in significant declines in eccentric, and concentric, knee flexor strength (eccentric = 26 ± 4 Nm, 15% P < 0.001; concentric 11 ± 2 Nm, 10% P < 0.001). Eccentric BF myoelectrical activity was significantly reduced (10%; P = 0.035). Concentric BF and all MH myoelectrical activity were not altered. The declines in maximal eccentric torque were associated with the change in eccentric BF myoelectrical activity (P = 0.013). Following repeat sprint running, there were preferential declines in the myoelectrical activity of the BF, which explained declines in eccentric knee flexor strength. |
Year | 2014 |
Journal | Scandinavian Journal of Medicine & Science in Sports |
Journal citation | 24 (4), pp. e299-e305 |
Publisher | Wiley-Blackwell Publishing Ltd. |
ISSN | 1600-0838 |
Digital Object Identifier (DOI) | https://doi.org/10.1111/sms.12171 |
Scopus EID | 2-s2.0-84904417278 |
Open access | Published as green open access |
Research or scholarly | Research |
Page range | e299-e305 |
Research Group | Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre |
Author's accepted manuscript | File Access Level Open |
Publisher's version | License All rights reserved File Access Level Controlled |
https://acuresearchbank.acu.edu.au/item/85yz5/reduced-biceps-femoris-myoelectrical-activity-influences-eccentric-knee-flexor-weakness-after-repeat-sprint-running
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AM_Timmins_2014_Reduced_biceps_femoris_myoelectrical_activity_influences.pdf | |
File access level: Open |
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