Ipsilateral corticomotor responses are confined to the homologous muscle following cross-education of muscular strength
Mason, J., Frazer, A. K., Horvath, D. M., Pearce, A. J., Avela, J., Howatson, G., & Kidgell, D. J. (2018). Ipsilateral corticomotor responses are confined to the homologous muscle following cross-education of muscular strength. Applied Physiology, Nutrition and Metabolism, 43(1), 11-22. https://doi.org/10.1139/apnm-2017-0457
Published inApplied Physiology, Nutrition and Metabolism
© the Authors, 2018. This is a final draft version of an article whose final and definitive form has been published by National Research Council Canada. Published in this repository with the kind permission of the publisher.
Cross-education of strength occurs when strength-training 1 limb increases the strength of the untrained limb and is restricted to the untrained homologous muscle. Cortical circuits located ipsilateral to the trained limb might be involved. We used transcranial magnetic stimulation (TMS) to determine the corticomotor responses from the untrained homologous (biceps brachii) and nonhomologous (flexor carpi radialis) muscle following strength-training of the right elbow flexors. Motor evoked potentials were recorded from the untrained left biceps brachii and flexor carpi radialis during a submaximal contraction from 20 individuals (10 women, 10 men; aged 18–35 years; training group, n = 10; control group, n = 10) before and after 3 weeks of strength-training the right biceps brachii at 80% of 1-repetition maximum. Recruitment-curves for corticomotor excitability and inhibition of the untrained homologous and nonhomologous muscle were constructed and assessed by examining the area under the recruitment curve. Strength-training increased strength of the trained elbow flexors (29%), resulting in an 18% increase in contralateral strength of the untrained elbow flexors (P < 0.0001). The trained wrist flexors increased by 19%, resulting in a 12% increase in strength of the untrained wrist flexors (P = 0.005). TMS showed increased corticomotor excitability and decreased corticomotor inhibition for the untrained homologous muscle (P < 0.05); however, there were no changes in the untrained nonhomologous muscle (P > 0.05). These findings show that the cross-education of muscular strength is spatially distributed; however, the neural adaptations are confined to the motor pathway ipsilateral to the untrained homologous agonist. ...
PublisherNational Research Council Canada
Publication in research information system
MetadataShow full item record
- Liikuntatieteiden tiedekunta 
Showing items with similar title or keywords.
Active and passive recovery influence responses of luteinizing hormone and testosterone to a fatiguing strength loading Taipale, Ritva; Kyröläinen, Heikki; Gagnon, Dominique; Nindl, B.; Ahtiainen, Juha; Häkkinen, Keijo (Springer, 2018)The purpose of this study was to examine the acute hormonal and muscular responses to a strenuous strength loading [bilateral leg press (LP) 10x10 1RM] followed by loading-specific active (AR, n = 7, LP 10x10x30% 1RM) ...
Kujala, Urho M.; Vaara, Jani P.; Kainulainen, Heikki; Vasankari, Tommi; Vaara, Elina; Kyröläinen, Heikki (American Medical Association, 2019)Importance. High physical fitness is associated with a reduction in risk of cardiovascular diseases and death, but the underlying mechanisms are insufficiently understood. Objective. To determine how aerobic fitness and ...
Association between lower extremity muscular strength and acute knee injuries in young team‐sports athletes Hietamo, J.; Parkkari, J.; Leppänen, M.,; Steffen, K.; Kannus, P.; Vasankari, T.; Heinonen, A.; Mattila, V.; Pasanen, K. (John Wiley & Sons, 2020)The purpose of this study was to investigate LE muscular strength variables as potential risk factors for all and non‐contact acute knee and ACL injuries in young athletes. A total of 188 young (≤21) male and 174 female ...
Acute hormonal and muscular responses and recovery : chronic adaptations to single session combined strength and endurance training with regard to order effect Eklund, Daniela (2012)Combining both strength (S) and endurance (E) exercise loadings into a single training session can be considered to be of interest e.g. for time management purposes. However, the first loading in a combined session tends ...