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首页> 外文期刊>Medicine and science in sports and exercise >Protein Supplementation Does Not Augment Adaptations to Endurance Exercise Training
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Protein Supplementation Does Not Augment Adaptations to Endurance Exercise Training

机译：蛋白质补充不会增加适应耐力运动训练

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Introduction Recently, it has been speculated that protein supplementation may further augment the adaptations to chronic endurance exercise training. We assessed the effect of protein supplementation during chronic endurance exercise training on whole-body oxidative capacity (VO2max) and endurance exercise performance. Methods In this double-blind, randomized, parallel placebo-controlled trial, 60 recreationally active males (age, 27 +/- 6 yr; body mass index, 23.8 +/- 2.6 kg center dot m(-2); VO2max, 47 +/- 6 mL center dot min(-1)center dot kg(-1)) were subjected to 12 wk of triweekly endurance exercise training. After each session and each night before sleep, participants ingested either a protein supplement (PRO; 28.7 g casein protein) or an isoenergetic carbohydrate placebo (PLA). Before and after the 12 wk of training, VO2max and endurance exercise performance (similar to 10-km time trial) were assessed on a cycle ergometer. Muscular endurance (total workload achieved during 30 reciprocal isokinetic contractions) was assessed by isokinetic dynamometry and body composition by dual-energy x-ray absorptiometry. Mixed-model ANOVA was applied to assess whether training adaptations differed between groups. Results Endurance exercise training induced an 11% +/- 6% increase in VO2max (time effect, P < 0.0001), with no differences between groups (PRO, 48 +/- 6 to 53 +/- 7 mL center dot min(-1)center dot kg(-1); PLA, 46 +/- 5 to 51 +/- 6 mL center dot min(-1)center dot kg(-1); time-treatment interaction, P = 0.50). Time to complete the time trial was reduced by 14% +/- 7% (time effect, P < 0.0001), with no differences between groups (time-treatment interaction, P = 0.15). Muscular endurance increased by 6% +/- 7% (time effect, P < 0.0001), with no differences between groups (time-treatment interaction, P = 0.84). Leg lean mass showed an increase after training (P < 0.0001), which tended to be greater in PRO compared with PLA (0.5 +/- 0.7 vs 0.2 +/- 0.6 kg, respectively; time-treatment interaction, P = 0.073). Conclusion Protein supplementation after exercise and before sleep does not further augment the gains in whole-body oxidative capacity and endurance exercise performance after chronic endurance exercise training in recreationally active, healthy young males.
机译：介绍最近，已经推测蛋白质补充可能进一步增加对慢性耐力运动训练的适应性。我们评估了蛋白质补充在慢性耐久性运动训练中对全身氧化能力（VO2MAX）和耐力运动表现的影响。方法在这种双盲，随机，并行安慰剂对照试验中，60例娱乐活动（年龄，27 +/- 6 Yr;体重指数，23.8 +/- 2.6千克中心DOT M（-2）; vo2max，47 +/- 6毫升中心点MIN（-1）中心点kg（-1））经过12周的三周耐力运动训练。在每次会议和每晚睡觉前，参与者摄入蛋白质补充剂（Pro; 28.7g酪蛋白蛋白）或异液碳水化合物安慰剂（PLA）。在12周之前和之后，在循环测力计上评估vo2max和耐力运动性能（类似于10熟时间的试验）。通过双能动力学和体组合物通过双能X射线吸收测定法评估肌肉耐力（在30次往复式等离子体收缩期间实现的总工作量）。混合模型Anova应用于评估培训适应是否在组之间不同。结果耐力运动培训诱导vo2max增加11％+/- 6％（时间效应，p <0.0001），群体之间没有差异（Pro，48 +/- 6至53 +/- 7ml中心点Min（ - 1）中心点kg（-1）; PLA，46 +/- 5至51 +/- 6 mL中心点MIN（-1）中心点kg（-1）;时间处理相互作用，p = 0.50）。完成时间试验的时间减少了14％+/- 7％（时间效应，P <0.0001），组之间没有差异（时间处理相互作用，P = 0.15）。肌肉耐力增加6％+/- 7％（时间效应，P <0.0001），组之间没有差异（时间处理相互作用，P = 0.84）。训练后（P <0.0001）后，腿部瘦肿块均呈增加，与PLA（0.5 +/- 0.7 Vs 0.2 +/- 0.6千克分别相比，促进较大程度;时间处理相互作用，P = 0.073）。结论蛋白质补充运动后，睡眠前并未进一步增加全身氧化能力和耐久性运动表现，慢性耐力运动训练在娱乐性健康的年轻男性中。

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