Modulation of neural and muscular adaptation processes during resistance training by fish protein ingestions in older adults.
Modulation of neural and muscular adaptation processes during resistance training by fish protein ingestions in older adults.
复制标题
老年人摄入鱼蛋白对阻力训练期间神经和肌肉适应过程的调节。
DOI：
10.1093/gerona/glz215
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Moritani T.
中科院分区：
文献类型：
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作者：
Watanabe K;Holobar A;Mita Y;Tomita A;Yoshiko A;Kouzaki M;Uchida K;Moritani T.
干预期间神经和肌肉适应的评估将为制定与年龄相关的肌肉功能障碍的对策提供有价值的信息。我们研究了鱼类蛋白摄入对老年人训练诱导的神经和肌肉适应的影响。20名老年人参加了为期8周的等长膝关节伸展训练干预。参与者被分为两组，分别服用鱼蛋白（n= 10，阿拉斯加鳕鱼蛋白，APP）和酪蛋白（n= 10， CAS）。在干预前、干预中、干预后分别测量膝关节伸展时的最大肌力、下肢肌肉质量（体阻抗法）和膝关节伸肌运动单元放电模式（高密度表面肌电图）。干预后CAS组（124.7±5.8%）和APP组（117.1±4.4%）肌力均显著增高（p< 0.05），组间差异无统计学意义（p< 0.05）。从0到8周，只有APP组下肢肌肉质量显著增加（102.0±3.2,p< 0.05）。干预后运动单元放电模式的变化在CAS组比APP组更大。这些结果表明，营养补充可以调节阻力训练后的神经和肌肉适应，而在老年人中，摄入鱼蛋白优先诱导肌肉适应，而没有可检测到的神经适应。
Assessments of both neural and muscular adaptations during interventions would provide valuable information for developing countermeasures to age-related muscle dysfunctions. We investigated the effect of fish protein ingestion on training-induced neural and muscular adaptations in older adults. Twenty older adults participated 8 weeks of isometric knee extension training intervention. The participants were divided into two groups who took fish protein (n= 10, Alaska pollack protein, APP) or casein (n= 10, CAS). Maximal muscle strength during knee extension, lower extremity muscle mass (body impedance method), and motor unit firing pattern of knee extensor muscle (high-density surface electromyography) were measured before, during, and after the intervention. Muscle strength were significantly increased in both CAS (124.7 ± 5.8%) and APP (117.1 ± 4.4%) after intervention (p< .05), but no significant differences between the groups were observed (p> .05). Significant increases in lower extremity muscle mass from 0 to 8 weeks were demonstrated only for APP (102.0 ± 3.2,p< .05). Greater changes in motor unit firing pattern following intervention were represented in CAS more than in APP. These results suggest that nutritional supplementations could modulate neural and muscular adaptations following resistance training and fish protein ingestion preferentially induces muscular adaptation without the detectable neural adaptation in older adults.