UNASSIGNED:这项研究的目的是探索仅碳水化合物或碳水化合物加蛋白质补充剂对耐力和肌肉损伤的影响。
UNASSIGNED:十名休闲运动的男性跑步者(VO2max:53.61±3.86ml/kg·min)在不同摄入量的干预饮料下完成了3次疲劳试验。测试之间有7天的清洗期。每次测试以70%VO2max运行60分钟开始(第1阶段),随后进行耐力测试:在80%VO2max下消耗时间(第2阶段)。参与者随机摄入1)在1期前和2期前0.4g/kgBM碳水化合物(CHO+CHO),2)第一阶段前0.4g/kgBM蛋白和第二阶段前0.4g/kgBM碳水化合物(PRO+CHO),或3)第一阶段前0.4g/kgBM碳水化合物和第二阶段前0.4g/kgBM蛋白(CHOPRO)。所有受试者在1期期间摄入碳水化合物(CHO)1.2g/kgBM,立即,运动后24小时测量丙氨酸氨基转移酶(ALT),天冬氨酸转氨酶(AST),肌酸激酶(CK),和肌红蛋白(MB)。
未授权:三种补充策略(CHOCHO:432±225s;PROCHO:463±227s;CHOPRO:461±248s)在耗尽时间上没有显着差异。然而,运动后24h,PROCHO的ALT和AST显着低于CHOCHO(ALT:16.80±6.31vs.24.39±2.54U/L;AST:24.06±4.77vs.31.51±7.53U/L,p<0.05)。运动后24小时PRO+CHO和CHO+PRO的MB显著低于CHO+CHO(40.7±15.2;38.1±14.3;64.3±28.9ng/mL,分别,p<0.05)。运动后24小时,与CHOCHO相比,PROCHO中的CK增加较少(404.22±75.31VS。642.33±68.57U/L,p<0.05)。
UNASSIGNED:碳水化合物和蛋白质补充策略可以减少耐力运动引起的肌肉损伤,但它们并不能提高耐力运动能力。
UNASSIGNED: The purpose of this study is to explore the effect of carbohydrate only or carbohydrate plus protein supplementation on endurance capacity and muscle damage.
UNASSIGNED: Ten recreationally active male runners (VO2max: 53.61 ± 3.86 ml/kg·min) completed run-to-exhaustion test three times with different intakes of intervention drinks. There was a 7-day wash-out period between tests. Each test started with 60 minutes of running at 70% VO2max (phase 1), followed by an endurance capacity test: time-to-exhaustion running at 80% VO2max (phase 2). Participants randomly ingested either 1) 0.4 g/kg BM carbohydrate before phase 1 and before phase 2 (CHO+CHO), 2) 0.4 g/kg BM protein before phase 1 and 0.4 g/kg BM carbohydrate before phase 2 (PRO+CHO), or 3) 0.4 g/kg BM carbohydrate before phase 1 and 0.4 g/kg BM protein before phase 2 (CHO+PRO). All subjects ingested carbohydrate (CHO) 1.2 g/kg BM during phase 1, and blood samples were obtained before, immediately, and 24 h after exercise for measurements of alanine aminotransferase (ALT), aspartate aminotransferase (AST), creatine kinase (CK), and myoglobin (MB).
UNASSIGNED: There was no significant difference in time to exhaustion between the three supplement strategies (CHO+CHO: 432 ± 225 s; PRO+CHO: 463 ± 227 s; CHO+PRO: 461 ± 248 s). However, ALT and AST were significantly lower in PRO+CHO than in CHO+CHO 24 h after exercise (ALT: 16.80 ± 6.31 vs. 24.39 ± 2.54 U/L; AST: 24.06 ± 4.77 vs. 31.51 ± 7.53 U/L, p < 0.05). MB was significantly lower in PRO+CHO and CHO+PRO than in CHO+CHO 24 h after exercise (40.7 ± 15.2; 38.1 ± 14.3; 64.3 ± 28.9 ng/mL, respectively, p < 0.05). CK increased less in PRO+CHO compared to CHO+CHO 24 h after exercise (404.22 ± 75.31 VS. 642.33 ± 68.57 U/L, p < 0.05).
UNASSIGNED: Carbohydrate and protein supplement strategies can reduce muscle damage caused by endurance exercise, but they do not improve endurance exercise capacity.