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Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults

The age-related attenuation in neuromuscular function can be mitigated with strength training. Current recommendations for untrained and elderly recommend performing the strength training with a controlled movement velocity (CON). However, applying maximal intended velocity (MIV) in the concentric p...

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Autores principales: Tøien, Tiril, Malmo, Thomas, Espedal, Lars, Wang, Eivind
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9613575/
https://www.ncbi.nlm.nih.gov/pubmed/36112218
http://dx.doi.org/10.1007/s00421-022-05045-8
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author Tøien, Tiril
Malmo, Thomas
Espedal, Lars
Wang, Eivind
author_facet Tøien, Tiril
Malmo, Thomas
Espedal, Lars
Wang, Eivind
author_sort Tøien, Tiril
collection PubMed
description The age-related attenuation in neuromuscular function can be mitigated with strength training. Current recommendations for untrained and elderly recommend performing the strength training with a controlled movement velocity (CON). However, applying maximal intended velocity (MIV) in the concentric phase of movement may augment neuromuscular stimulation and potentially enhance training adaptations. Thus, applying rate of electromyography (EMG) rise (RER) recordings, we examined the acute early phase neuromuscular response to these two contraction types in quadriceps femoris during leg extension, along with actual movement velocity, in 12 older (76 ± 6 years) and 12 young men (23 ± 2 years). Results revealed that older adults had a lower one repetition maximum (1RM) than young (33 ± 9 kg vs. 50 ± 9 kg; p = 0.001) and lower actual velocity across relative intensities of ~ 10%, 30%, 50%, 70% and 90% of 1RM for CON and MIV (all p < 0.05). Older adults also had consistently reduced RER compared to young during both conditions (old: 1043–1810 μV; young: 1844–3015 μV; all p < 0.05). However, RER was higher in contractions with MIV compared to CON for both age groups, and across all intensities (98–674%, all p < 0.05). In conclusion, despite decreased maximal strength and attenuated neuromuscular response with advancing age, our results document an augmented neuromuscular activation when repetitions are performed with MIV in the concentric phase of movement.
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spelling pubmed-96135752022-10-29 Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults Tøien, Tiril Malmo, Thomas Espedal, Lars Wang, Eivind Eur J Appl Physiol Original Article The age-related attenuation in neuromuscular function can be mitigated with strength training. Current recommendations for untrained and elderly recommend performing the strength training with a controlled movement velocity (CON). However, applying maximal intended velocity (MIV) in the concentric phase of movement may augment neuromuscular stimulation and potentially enhance training adaptations. Thus, applying rate of electromyography (EMG) rise (RER) recordings, we examined the acute early phase neuromuscular response to these two contraction types in quadriceps femoris during leg extension, along with actual movement velocity, in 12 older (76 ± 6 years) and 12 young men (23 ± 2 years). Results revealed that older adults had a lower one repetition maximum (1RM) than young (33 ± 9 kg vs. 50 ± 9 kg; p = 0.001) and lower actual velocity across relative intensities of ~ 10%, 30%, 50%, 70% and 90% of 1RM for CON and MIV (all p < 0.05). Older adults also had consistently reduced RER compared to young during both conditions (old: 1043–1810 μV; young: 1844–3015 μV; all p < 0.05). However, RER was higher in contractions with MIV compared to CON for both age groups, and across all intensities (98–674%, all p < 0.05). In conclusion, despite decreased maximal strength and attenuated neuromuscular response with advancing age, our results document an augmented neuromuscular activation when repetitions are performed with MIV in the concentric phase of movement. Springer Berlin Heidelberg 2022-09-16 2022 /pmc/articles/PMC9613575/ /pubmed/36112218 http://dx.doi.org/10.1007/s00421-022-05045-8 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Original Article
Tøien, Tiril
Malmo, Thomas
Espedal, Lars
Wang, Eivind
Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
title Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
title_full Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
title_fullStr Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
title_full_unstemmed Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
title_short Maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
title_sort maximal intended velocity enhances strength training-induced neuromuscular stimulation in older adults
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9613575/
https://www.ncbi.nlm.nih.gov/pubmed/36112218
http://dx.doi.org/10.1007/s00421-022-05045-8
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