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Type: | Artigo |
Title: | Expression of genes related to muscle plasticity after strength and power training regimens |
Author: | Lamas, L. Aoki, M. S. Ugrinowitsch, C. Campos, G. E. R. Regazzini, M. Moriscot, A. S. Tricoli, V. |
Abstract: | The purpose of our study was to compare the effects of 8-week progressive strength and power training regimens on strength gains and muscle plasticity [muscle fiber hypertrophy and phenotype shift, mammalian target of rapamycin (mTOR), regulatory-associated protein of mTOR (RAPTOR), rapamycin-insensitive companion of m-TOR (RICTOR), calcineurin and calcipressin gene expression]. Twenty-nine physically active subjects were divided into three groups: strength training (ST), power training (PT) and control (C). Squat 1 RM and muscle biopsies were obtained before and after the training period. Strength increased similarly for both ST and PT groups (P < 0.001). Fiber types I, IIa and IIb presented hypertrophy main time effect (P < 0.05). Only type IIb percentage decreased from pre- to post-test (main time effect, P < 0.05). mTOR and RICTOR mRNA expression increased similarly from pre- to post-test (P < 0.01). RAPTOR increased after training for both groups (P < 0.0001), but to a greater extent in the ST (P < 0.001) than in the PT group. 4EBP-1 decreased after training when the ST and PT groups were pooled (P < 0.05). Calcineurin levels did not change after training, while calcipressin increased similarly from pre- to post-test (P < 0.01). In conclusion, our data indicate that these training regimens produce similar performance improvements; however, there was a trend toward greater hypertrophy-related gene expression and muscle fiber hypertrophy in the ST group |
Subject: | Expressão gênica |
Country: | Reino Unido |
Editor: | Wiley |
Rights: | Fechado |
Identifier DOI: | 10.1111/j.1600-0838.2009.00905.x |
Address: | https://onlinelibrary.wiley.com/doi/full/10.1111/j.1600-0838.2009.00905.x |
Date Issue: | 2010 |
Appears in Collections: | IB - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
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000275395400007.pdf | 241.1 kB | Adobe PDF | View/Open |
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