Relationship Between Muscle Swelling and Hypertrophy Induced by Resistance Training
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Tetsuya Hirono [1] ; Tome Ikezoe [1] ; Masashi Taniguchi [1] ; Hiroki Tanaka [1] ; Junya Saeki [2] ; Masahide Yagi [1] ; Jun Umehara [1] ; Noriaki Ichihashi [1]
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[1] Kyoto University
Kyoto University
Kamigyō-ku, Japón
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[2] Waseda University
Waseda University
Japón
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- Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 36, Nº. 2, 2022, págs. 359-364
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Muscle swelling immediately after resistance exercise may be induced by metabolic stress. The accumulation of metabolic stress is considered to promote muscle hypertrophy after several weeks of resistance training (RT). The purpose of this study was to determine the relationship between muscle swelling immediately after the first session of RT and muscle hypertrophy after a 6-week RT using ultrasonography. Twenty-two untrained young men performed knee extension resistance exercise consisting of 3 sets with 8 repetitions at a load of 80% of one repetition maximum for 6 weeks (3 d[middle dot]wk-1). Muscle thickness of the quadriceps femoris was measured using ultrasonography device at 3 anatomical sites (proximal, medial, and distal sites) of the middle, lateral, and medial part of the anterior thigh. The sum of the muscle thickness at 9 measurement sites was used for analysis. Acute change in muscle thickness immediately after the first session of RT was used as an indicator of muscle swelling. Chronic change in muscle thickness after the 6-week RT was used as an indicator of muscle hypertrophy. A significant increase in muscle thickness was observed immediately after the first session of RT (8.3 +/- 3.2%, p < 0.001). After the 6-week RT, muscle thickness increased significantly (2.9 +/- 2.6%, p < 0.001). A significant positive correlation was found between muscle swelling and muscle hypertrophy ([rho] = 0.443, p = 0.039). This study suggests that the greater the muscle swelling immediately after the first session of RT, the greater the muscle hypertrophy after RT.
