背景:最近,许多研究致力于发现类似运动效果的营养素。已知抗阻运动和必需氨基酸(EAA)的摄入是可以影响肌肉质量和力量改善的因素。这项研究的目的是调查肌肉质量的变化,Myokines,以及抵抗运动和EAA补充反应的炎症。
方法:34名男性自愿参加本研究。他们被分配到四组:(1)安慰剂(CO),(2)阻力运动(RE),(3)补充EAA,和(4)RE+EAA补充。身体成分,肌肉质量,Myokines,在基线和治疗后4周测量炎症。
结果:RE组和RE+EAA组的瘦体脂肪均降低。仅REEAA组的瘦体重增加。在除CO以外的所有组中,irisin,肌肉生长抑制素A,TNF-α水平下降。RE组右手握力和躯干屈曲峰值扭矩增加。左手的握力,躯干屈曲峰值扭矩,在RE+EAA中,左腿的膝关节屈曲峰值扭矩增加。
结论:RE,EAA,RE+EAA能有效改善肌肉质量,Myokine,和年轻成年男性的炎症因子。这一发现强调了抗阻运动和氨基酸摄入的重要性。
BACKGROUND: Recently, many studies have been devoted to discovering nutrients for exercise-like effects. Resistance exercise and the intake of essential amino acids (EAAs) are known to be factors that can affect muscle mass and strength improvement. The purpose of this study was to investigate changes in muscle quality, myokines, and inflammation in response to resistance exercise and EAA supplementation.
METHODS: Thirty-four males volunteered to participate in this study. They were assigned to four groups: (1) placebo (CO), (2) resistance exercise (RE), (3) EAA supplementation, and (4) RE + EAA supplementation. Body composition, muscle quality, myokines, and inflammation were measured at baseline and four weeks after treatment.
RESULTS: Lean body fat had decreased in both RE and RE + EAA groups. Lean body mass had increased in only the RE + EAA group. In all groups except for CO, irisin, myostatin A, and TNF-α levels had decreased. The grip strength of the right hand and trunk flexion peak torque increased in the RE group. The grip strength of the left hand, trunk flexion peak torque, and knee flexion peak torque of the left leg were increased in RE + EAA.
CONCLUSIONS: RE, EAA, and RE + EAA could effectively improve the muscle quality, myokine, and inflammation factors of young adult males. This finding highlights the importance of resistance exercise and amino acid intake.