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dc.contributor.authorGomez-Guerrero, Gonzalo
dc.contributor.authorAvela, Janne
dc.contributor.authorJussila, Ilkka
dc.contributor.authorPihlajamäki, Esa
dc.contributor.authorDeng, Fu-Yu
dc.contributor.authorKidgell, Dawson J.
dc.contributor.authorAhtiainen, Juha P.
dc.contributor.authorWalker, Simon
dc.date.accessioned2024-03-15T13:55:57Z
dc.date.available2024-03-15T13:55:57Z
dc.date.issued2024
dc.identifier.citationGomez-Guerrero, G., Avela, J., Jussila, I., Pihlajamäki, E., Deng, F.-Y., Kidgell, D. J., Ahtiainen, J. P., & Walker, S. (2024). Cortical and spinal responses to short-term strength training and detraining in young and older adults in rectus femoris muscle. <i>European Journal of Applied Physiology</i>, <i>Early online</i>. <a href="https://doi.org/10.1007/s00421-024-05443-0" target="_blank">https://doi.org/10.1007/s00421-024-05443-0</a>
dc.identifier.otherCONVID_207584982
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/93948
dc.description.abstractIntroduction Strength training mitigates the age-related decline in strength and muscle activation but limited evidence exists on specific motor pathway adaptations. Methods Eleven young (22–34 years) and ten older (66–80 years) adults underwent five testing sessions where lumbar-evoked potentials (LEPs) and motor-evoked potentials (MEPs) were measured during 20 and 60% of maximum voluntary contraction (MVC). Ten stimulations, randomly delivered, targeted 25% of maximum compound action potential for LEPs and 120, 140, and 160% of active motor threshold (aMT) for MEPs. The 7-week whole-body resistance training intervention included five exercises, e.g., knee extension (5 sets) and leg press (3 sets), performed twice weekly and was followed by 4 weeks of detraining. Results Young had higher MVC (~ 63 N·m, p = 0.006), 1-RM (~ 50 kg, p = 0.002), and lower aMT (~ 9%, p = 0.030) than older adults at baseline. Young increased 1-RM (+ 18 kg, p < 0.001), skeletal muscle mass (SMM) (+ 0.9 kg, p = 0.009), and LEP amplitude (+ 0.174, p < 0.001) during 20% MVC. Older adults increased MVC (+ 13 N·m, p = 0.014), however, they experienced decreased LEP amplitude (− 0.241, p < 0.001) during 20% MVC and MEP amplitude reductions at 120% (− 0.157, p = 0.034), 140% (− 0.196, p = 0.026), and 160% (− 0.210, p = 0.006) aMT during 60% MVC trials. After detraining, young and older adults decreased 1-RM, while young adults decreased SMM. Conclusion Higher aMT and MEP amplitude in older adults were concomitant with lower baseline strength. Training increased strength in both groups, but divergent modifications in cortico-spinal activity occurred. Results suggest that the primary locus of adaptation occurs at the spinal level.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofseriesEuropean Journal of Applied Physiology
dc.rightsCC BY 4.0
dc.subject.otheraging
dc.subject.otherresistance training
dc.subject.otherTMS
dc.subject.otherlumbar stimulation
dc.subject.othercortico-spinal excitability
dc.subject.otherlower-limbs
dc.titleCortical and spinal responses to short-term strength training and detraining in young and older adults in rectus femoris muscle
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202403152463
dc.contributor.laitosLiikuntatieteellinen tiedekuntafi
dc.contributor.laitosFaculty of Sport and Health Sciencesen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn1439-6319
dc.relation.volumeEarly online
dc.type.versionpublishedVersion
dc.rights.copyright© 2024 the Authors
dc.rights.accesslevelopenAccessfi
dc.subject.ysoreidet
dc.subject.ysovoimaharjoittelu
dc.subject.ysoikääntyminen
dc.subject.ysoikääntyneet
dc.subject.ysokestävyysharjoittelu
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p13755
jyx.subject.urihttp://www.yso.fi/onto/yso/p16233
jyx.subject.urihttp://www.yso.fi/onto/yso/p5056
jyx.subject.urihttp://www.yso.fi/onto/yso/p2433
jyx.subject.urihttp://www.yso.fi/onto/yso/p7676
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1007/s00421-024-05443-0
jyx.fundinginformationOpen Access funding provided by University of Jyväskylä (JYU).
dc.type.okmA1


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