Journal ArticleDOI
Plantar flexor activation capacity and H reflex in older adults: adaptations to strength training
Gil Scaglioni,Alessandra Ferri,Alessandra Ferri,Alberto E. Minetti,Alain Martin,J. Van Hoecke,Paolo Capodaglio,Alessandro Sartorio,Marco V. Narici +8 more
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TLDR
Older men seem to preserve a high VA of plantar flexors, however, the impaired functionality of the reflex pathway with aging and the lack of modulation with exercise suggest that the decrease in the H(max)- to M(max) ratio and H index may be related to degenerative phenomena.Abstract:
The purpose of this study was to investigate whether the voluntary neural drive and the excitability of the reflex arc could be modulated by training, even in old age. To this aim, the effects of a 16-wk strengthening program on plantar flexor voluntary activation (VA) and on the maximum Hoffman reflex (H(max))-to-maximum M wave (M(max)) ratio were investigated in 14 elderly men (65-80 yr). After training, isometric maximum voluntary contraction (MVC) increased by 18% (P 65% MVC. Compared with younger men (24-35 yr), the H(max)- to M(max) ratio and nerve conduction velocity (H index) of the older group were significantly lower (42%, P < 0.05; and 29%, P < 0.001, respectively) and were not modulated by training. In conclusion, older men seem to preserve a high VA of plantar flexors. However, the impaired functionality of the reflex pathway with aging and the lack of modulation with exercise suggest that the decrease in the H(max)- to M(max) ratio and H index may be related to degenerative phenomena.read more
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The adaptations to strength training : morphological and neurological contributions to increased strength.
TL;DR: The gains in strength with HRST are undoubtedly due to a wide combination of neurological and morphological factors, although there is contrary evidence suggesting no change in cortical or corticospinal excitability.
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Dynapenia and Aging: An Update
Todd M. Manini,Brian C. Clark +1 more
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Neural adaptations to resistive exercise: mechanisms and recommendations for training practices.
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Sarcopenia: characteristics, mechanisms and functional significance
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Role of the nervous system in sarcopenia and muscle atrophy with aging: strength training as a countermeasure
Per Aagaard,Charlotte Suetta,Paolo Caserotti,Stig Peter Magnusson,Stig Peter Magnusson,Michael Kjaer +5 more
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References
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