METHODS: Thirty males were randomly assigned to either the APRE group (n = 15) or the LRE group (n = 15). Participants completed training three times a week for 8 weeks. The outcome measures included serum IGF-1, FST, MST, muscular strength (isometric knee extension and handgrip), power (vertical jump), lean body mass, and fat mass.
RESULTS: IGF-1 circulating levels increased over time following APRE (34%) and with no significant change following LRE (~-1%). There were no significant differences over time or between groups for FST or MST. Muscular strength (knee extension [21.5 vs. ~16%] and handgrip [right: 31 vs. 25%; left: 31.7 vs. 28.8%]) and power (~ 33 vs. ~26%) significantly increased to a greater extent following APRE compared to LRE. Interestingly, the results revealed that lean body mass increased over time only after APRE (~ 3%), but not LRE.
CONCLUSIONS: These findings suggest that APRE may be more effective than LRE in increasing muscular strength, power, and lean body mass, as well as circulating IGF-1 levels, in recreationally active males. The observed differences may be attributed to the increased training volume associated with APRE. However, further research is needed to directly assess muscle protein synthesis.
方法:30名男性被随机分配到APRE组(n=15)或LRE组(n=15)。参与者每周完成三次培训,共8周。结果测量包括血清IGF-1,FST,MST,肌肉力量(等距膝盖伸展和手握),功率(垂直跳跃),瘦体重,和脂肪量。
结果:IGF-1循环水平在APRE后随时间增加(34%),在LRE后没有显着变化(〜-1%)。FST或MST随时间或组间无显著差异。肌肉力量(膝盖伸展[21.5vs.~16%]和手柄[右:31vs.25%;左:31.7vs.28.8%])和功率(~33vs.~26%)与LRE相比,APRE后显著增加。有趣的是,结果显示,瘦体重仅在APRE后随时间增加(~3%),但不是LRE。
结论:这些研究结果表明,在增加肌肉力量方面,APRE可能比LRE更有效,电源,和瘦体重,以及循环IGF-1水平,在娱乐性活跃的男性中。观察到的差异可能归因于与APRE相关的训练量增加。然而,需要进一步的研究来直接评估肌肉蛋白质的合成。