Neither pre-sleep nor post-exercise protein consumption influences resistance exercise training adaptations in older adults.

IF 4.5 2区 医学 Q1 NUTRITION & DIETETICS
Alex O Klemp, Michael J Ormsbee, Mingchia Yeh, Chester M Sokolowski, Do-Houn Kim, Lynn B Panton, Jeong-Su Kim
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引用次数: 0

Abstract

Purpose: Limited data exists that compare pre-sleep versus post-exercise protein intake during resistance exercise training (RET) in older adults. This study examined whether 40 g of protein consumed post-exercise (PRP) or pre-sleep (PSP) enhances muscle thickness (MT) and strength compared to RET alone (RETO) in older men.

Methods: Thirty untrained older men (65.7 ± 4.0 yrs) completed 12 weeks of supervised RET (2×/week) and were randomized to PRP (n = 9), PSP (n = 11), or RETO (n = 10). MT of the vastus lateralis (VL), rectus femoris (RF), and vastus intermedius (VI) and 1-repetition maximum (1-RM) for leg and chest press were assessed at weeks 0, 6, and 12.

Results: VL (0 to 12 weeks: + 0.16 cm, 95% C.I. [0.06, 0.25]), RF (0 to 12 weeks: + 0.13 cm, 95% C.I. [0.03, 0.23]), and VI MT (0 to 12 weeks: + 0.18 cm, 95% C.I. [0.05, 0.31]) and chest press (0 to 12 weeks: + 10.9 kg, 95% C.I. [5.50, 16.3]) and leg press (0 to 12 weeks: + 28.3 kg, 95% C.I. [19.63, 37.1]) 1-RM increased (p < 0.050) with no group differences.

Conclusion: Consuming 40 g of protein post-exercise or pre-sleep did not enhance RET-induced improvements in muscle thickness or strength in older adults with adequate baseline protein intake (≥1.0 g/kg/day). RET alone elicited significant gains, emphasizing that adherence to training and meeting daily protein requirements are more critical than timing strategies for untrained older adults. ClinicalTrials.gov identifier: NCT05922475, 06/23/2023, retrospectively registered.

老年人睡眠前和运动后的蛋白质摄入都不会影响抗阻运动训练的适应性。
目的:比较老年人在抗阻运动训练(RET)中睡眠前和运动后蛋白质摄入量的数据有限。这项研究检测了与单独运动后(RETO)相比,运动后(PRP)或睡眠前(PSP)摄入40克蛋白质是否能增强老年男性的肌肉厚度(MT)和力量。方法:30名未经训练的老年男性(65.7±4.0岁)完成了12周的监督RET(2次/周),随机分为PRP (n = 9), PSP (n = 11)或RETO (n = 10)组。在第0、6和12周评估股外侧肌(VL)、股直肌(RF)和股中间肌(VI)的MT以及腿部和胸部按压的1次最大重复(1-RM)。结果:VL(0 ~ 12周:+ 0.16 cm, 95% C.I.[0.06, 0.25])、RF(0 ~ 12周:+ 0.13 cm, 95% C.I.[0.03, 0.23])、VI MT(0 ~ 12周:+ 0.18 cm, 95% C.I.[0.05, 0.31])、胸按压(0 ~ 12周:+ 10.9 kg, 95% C.I.[5.50, 16.3])和腿按压(0 ~ 12周:+ 28.3 kg, 95% C.I. [19.63, 37.1]) 1-RM升高(p < 0.050),组间无差异。结论:在基线蛋白质摄入量充足(≥1.0 g/kg/天)的老年人中,运动后或睡前摄入40 g蛋白质并不能增强ret诱导的肌肉厚度或力量的改善。RET单独产生显著的收益,强调坚持训练和满足每日蛋白质需求比未训练的老年人的时间策略更重要。ClinicalTrials.gov识别码:NCT05922475, 06/23/2023,回顾性注册。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of the International Society of Sports Nutrition
Journal of the International Society of Sports Nutrition NUTRITION & DIETETICS-SPORT SCIENCES
CiteScore
8.80
自引率
3.90%
发文量
34
审稿时长
6-12 weeks
期刊介绍: Journal of the International Society of Sports Nutrition (JISSN) focuses on the acute and chronic effects of sports nutrition and supplementation strategies on body composition, physical performance and metabolism. JISSN is aimed at researchers and sport enthusiasts focused on delivering knowledge on exercise and nutrition on health, disease, rehabilitation, training, and performance. The journal provides a platform on which readers can determine nutritional strategies that may enhance exercise and/or training adaptations leading to improved health and performance.
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