Temporal increase in muscle cross-sectional area as an acute effect of resistance exercise in resistance-trained and untrained individuals
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/94453
Título: | Temporal increase in muscle cross-sectional area as an acute effect of resistance exercise in resistance-trained and untrained individuals |
---|---|
Autor/es: | Goto, Masahiro | Kumada, Hitoshi | Maeda, Chikako | Yamashina, Yoshihiro | Yamato, Yosuke | Honda, Hiroto | Aoyama, Hiroki | Hamaoka, Takafumi |
Palabras clave: | Muscle hypertrophy | Oxygenated haemoglobin | Hypoxia | Intramuscular hydration | Muscle pump |
Área/s de conocimiento: | Educación Física y Deportiva |
Fecha de publicación: | 2020 |
Editor: | Universidad de Alicante. Área de Educación Física y Deporte |
Cita bibliográfica: | Journal of Human Sport and Exercise. 2020, 15(2): 457-459. doi:10.14198/jhse.2020.152.19 |
Resumen: | The purpose of this study was to compare the temporal increase in muscle cross-sectional area (CSA) as the acute response of resistance exercise (RE) between resistance-trained and untrained groups, and investigate the factors that affect the muscle CSA. Resistance-trained (n = 14) and untrained (n = 14) subjects performed four kinds of triceps brachii RE. Muscle CSA and intracellular hydration (IH), were measured prior to and 5-, 30-, and 60-minute after RE. Pearson's correlation coefficient was calculated to clarify the relationships among percent increases in muscle CSA and IH, area under the Oyx-Hb curve, blood lactate concentration, and % maximum voluntary contraction (MVC)-root-mean-square (RMS) of electromyogram (EMG). At 5-minute after RE, muscle CSA increased significantly to 120.2 ± 6.3% in the resistance-trained group and 105.5 ± 2.3% in the untrained group (p < 0.01). However, neither group showed a significant difference between the values before and 30-minute after RE. In the resistance-trained group, there was a significant increase in IH at 5-minute post-RH (p < 0.01), and correlations were found between percent increases in muscle CSA and IH (r = 0.70, p < 0.01), area under the Oxy-Hb curve (r = 0.77, p < 0.01), and % MVC-RMS of EMG (r = 0.72, p < 0.01). The findings of this study suggest that measurements of muscle CSA in studies of muscle hypertrophy should be performed 30-minute or more after the last resistance exercise session, and muscle pump exercises should be conducted just before participation in bodybuilding, and physique contests. |
URI: | https://doi.org/10.14198/jhse.2020.152.19 | http://hdl.handle.net/10045/94453 |
ISSN: | 1988-5202 |
DOI: | 10.14198/jhse.2020.152.19 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | Licencia Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 |
Revisión científica: | si |
Versión del editor: | https://www.jhse.ua.es/ |
Aparece en las colecciones: | Journal of Human Sport and Exercise - 2020, Vol. 15, No. 2 |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
JHSE_2020_15-2_19.pdf | 437,08 kB | Adobe PDF | Abrir Vista previa | |
Este ítem está licenciado bajo Licencia Creative Commons