Concurrent training effect on muscle fibers in Wistar rats

• Autor(a) principal: Castoldi, Robson Chacon [UNESP]
• Data de Publicação: 2013
• Outros Autores: Trindade Camargo, Regina Celi [UNESP], Barbosa Magalhaes, Alan Jose [UNESP], Tamura Ozaki, Guilherme Akio [UNESP], Kodama, Fabio Yoshikazu [UNESP], Oikawa, Sergio Minoru [UNESP], Papoti, Marcelo [UNESP], Silva Camargo Filho, Jose Carlos [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1980-65742013000400008; http://hdl.handle.net/11449/113378
• topic: skeletal muscle; soleus muscle; concurrent training; aerobic exercise; anaerobic exercise

The aim of the present study was to determine the modeling of muscle fibers in rats submitted to different exercise protocols. Fifty-five Wistar rats were submitted divided into four different groups: Control group (CG; N=16); endurance training group (ETG; N=13), strength training group (STG; N=13) and concurrent training group (CTG; N=13). The intensity of endurance training was determined by the critical workload. Statistical analysis involved the Kruskal-Wallis test for multiple comparisons, followed by Dunn's post test (p<0.05). All animals submitted to training exhibited an increase in the cross-sectional area of the muscle fibers. The largest increase (p>0.05) occurred in the STG and CTG at both four (mean: 2952,95 +/- 878,39 mean: 2988,84 +/- 822,58) and eight weeks respectively (mean: 3020,26 +/- 800.91; mean: 3104,91 +/- 817,87). The findings demonstrate similar results obtained with strength training and concurrent training, with a greater increase in muscle fiber area in both groups in comparison to the control group and group submitted to endurance training.