Differential modulation of corticomotor excitability in older compared to young adults following a single bout of strength -exercise
Siddique, U., Frazer, A. K., Avela, J., Walker, S., Ahtiainen, J. P., Tanel, M., Uribe, S., Akalu, Y., Rostami, M., Tallent, J., & Kidgell, D. J. (2024). Differential modulation of corticomotor excitability in older compared to young adults following a single bout of strength -exercise. Archives of Gerontology and Geriatrics, 122, Article 105384. https://doi.org/10.1016/j.archger.2024.105384
Julkaistu sarjassa
Archives of Gerontology and GeriatricsTekijät
Päivämäärä
2024Oppiaine
Valmennus- ja testausoppiBiomekaniikkaHyvinvoinnin tutkimuksen yhteisöScience of Sport Coaching and Fitness TestingBiomechanicsSchool of WellbeingTekijänoikeudet
© 2024 The Author(s). Published by Elsevier B.V.
Evidence shows corticomotor plasticity diminishes with age. Nevertheless, whether strength-training, a proven intervention that induces corticomotor plasticity in younger adults, also takes effect in older adults, remains untested. This study examined the effect of a single-session of strength-exercise on corticomotor plasticity in older and younger adults. Thirteen older adults (72.3 ± 6.5 years) and eleven younger adults (29.9 ± 6.9 years), novice to strength-exercise, participated. Strength-exercise involved four sets of 6–8 repetitions of a dumbbell biceps curl at 70–75% of their one-repetition maximum (1-RM). Muscle strength, cortical, corticomotor and spinal excitability, before and up to 60-minutes after the strength-exercise session were assessed. We observed significant changes over time (p < 0.05) and an interaction between time and age group (p < 0.05) indicating a decrease in corticomotor excitability (18% p < 0.05) for older adults at 30- and 60-minutes post strength-exercise and an increase (26% and 40%, all p < 0.05) in younger adults at the same time points. Voluntary activation (VA) declined in older adults immediately post and 60-minutes post strength-exercise (36% and 25%, all p < 0.05). Exercise had no effect on the cortical silent period (cSP) in older adults however, in young adults cSP durations were shorter at both 30- and 60- minute time points (17% 30-minute post and 9% 60-minute post, p < 0.05). There were no differences in short-interval cortical inhibition (SICI) or intracortical facilitation (ICF) between groups. Although the corticomotor responses to strength-exercise were different within groups, overall, the neural responses seem to be independent of age.
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Julkaisija
ElsevierISSN Hae Julkaisufoorumista
0167-4943Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/207613180
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Akatemiatutkija, SALisätietoja rahoituksesta
U. Siddique is supported by a Monash University Graduate Scholarship. J. Tallent was supported by an International Leverhulme Fellowship Award and S. Walker is supported by Funding from The Academy of Finland #350528.Lisenssi
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