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| Author(s): |
Lilian França Wallerstein
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Escola de Educação Física e Esportes (EEFE/BT) |
| Defense date: | 2010-03-15 |
| Examining board members: |
Carlos Ugrinowitsch;
Marco Tulio de Mello;
Andre Luiz Felix Rodacki
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| Advisor: | Carlos Ugrinowitsch |
| Abstract | |
In spite of sarcopenia-induced losses, elderly peoples neuromuscular system keeps its plasticity. However, strength and power training-induced adaptations have not been completely elucidated. It also unknown if these adaptations are related to elderly functionality. Fourty three healthy and independent old men and women (63.8 ± 4.0 yrs; 67.2 ±13.4kg e 160.2 ±8.4cm) with no resistance training experience volunteered for this study. Participants were randomly distributed into three groups: GF (n= 14; 70 - 90%-1RM), GP (n= 16; 30 - 50%-1RM) e GC (n= 13, no training). GF and GP trained twice a week for 16 weeks. Leg-press (42.7% in GF and 33.8% in GP) and chest-press 1-RM (31% in GF and 25.4% in GP), quadriceps cross sectional area (6% in GF and 3.6% in GP), maximal voluntary isometric contraction (22.4% in GF and 17.1% in GP) were significantly increased in both groups. Electromechanical delay decreased 28% in GF and 32% in GP. There were no significant differences between groups. EMG and rate of force development did not change throughout the training period. Only main effect of time was observed for the functional tests. These results suggest that even with different characteristics, both strength and power training induce similar neuromuscular adaptations. Thus, both training regimens are equally effective in preventing and treating sarcopenia (AU) | |