Inter-session reliability and sex-related differences in hamstrings total reaction time, pre-motor time and motor time during eccentric isokinetic contractions in recreational athlete

Ayala, Francisco, De Ste Croix, Mark B ORCID: 0000-0001-9911-4355, Sainz de Baranda, Pilar and Santonja, Fernando (2014) Inter-session reliability and sex-related differences in hamstrings total reaction time, pre-motor time and motor time during eccentric isokinetic contractions in recreational athlete. Journal of Electromyography and Kinesiology, 24 (2). pp. 200-206. doi:10.1016/j.jelekin.2013.12.006

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Abstract

The purposes were twofold: (a) to ascertain the inter-session reliability of hamstrings total reaction time, pre-motor time and motor time; and (b) to examine sex-related differences in the hamstrings reaction times profile. Twenty-four men and 24 women completed the study. Biceps femoris and semitendinosus total reaction time, pre-motor time and motor time measured during eccentric isokinetic contractions were recorded on three different occasions. Inter-session reliability was examined through typical percentage error (CVTE), percentage change in the mean (CM) and intraclass correlations (ICC). For both biceps femoris and semitendinosus, total reaction time, pre-motor time and motor time measures demonstrated moderate inter-session reliability (CVTE < 10%; CM < 3%; ICC > 0.7). The results also indicated that, although not statistically significant, women reported consistently longer hamstrings total reaction time (23.5 ms), pre-motor time (12.7 ms) and motor time (7.5 ms) values than men. Therefore, an observed change larger than 5%, 9% and 8% for total reaction time, pre-motor time and motor time respectively from baseline scores after performing a training program would indicate that a real change was likely. Furthermore, while not statistically significant, sex differences were noted in the hamstrings reaction time profile which may play a role in the greater incidence of ACL injuries in women.

Item Type:	Article
Article Type:	Article
Uncontrolled Keywords:	Reproducibility; Anterior cruciate ligament injury; Error of measurement; Electromechanical delay
Subjects:	R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Schools and Research Institutes > School of Education and Science
Research Priority Areas:	Health, Life Sciences, Sport and Wellbeing
Depositing User:	Anne Pengelly
Date Deposited:	02 Mar 2016 16:35
Last Modified:	31 Aug 2023 09:10
URI:	https://eprints.glos.ac.uk/id/eprint/3157

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