Francois Monique E, Graham Matthew J, Parr Evelyn B, Rehrer Nancy J, Lucas Samuel J E, Stavrianeas Stasinos, Cotter James D
School of Physical Education, Sport and Exercise Sciences, University of Otago, Dunedin, New Zealand.
Department of Physiology, University of Otago, Dunedin, New Zealand.
Metabolism. 2017 Mar;68:1-10. doi: 10.1016/j.metabol.2016.11.009. Epub 2016 Nov 26.
To compare energy use and substrate partitioning arising from repeated lower- versus upper-body sprints, or endurance exercise, across a 24-h period.
Twelve untrained males (24±4 y) completed three trials in randomized order: (1) repeated sprints (five 30-s Wingate, 4.5-min recovery) on a cycle ergometer (SIT); (2) 50-min continuous cycling at 65% V̇Omax (END); (3) repeated sprints on an arm-crank ergometer (SIT). Respiratory gas exchange was assessed before and during exercise, and at eight points across 22h of recovery.
Metabolic rate was elevated to greater extent in the first 8h after SIT than SIT (by 0.8±1.1kJ/min, p=0.03), and tended to be greater than END (by 0.7±1.3kJ/min, p=0.08). Total 24-h energy use (exercise+recovery) was equivalent between SIT and END (p = 0.55), and SIT and SIT (p=0.13), but 24-h fat use was higher with SIT than END (by 26±38g, p=0.04) and SIT (by 27±43g, p=0.05), whereas carbohydrate use was higher with SIT than SIT (by 32±51g, p=0.05). Plasma volume-corrected post-exercise and fasting glucose and lipid concentrations were unchanged.
Despite much lower energy use during five sprints than 50-min continuous exercise, 24-h energy use was not reliably different. However, (i) fat metabolism was greater after sprints, and (ii) carbohydrate metabolism was greater in the hours after sprints with arms than legs, while 24-h energy usage was comparable. Thus, sprints using arms or legs may be an important adjunct exercise mode for metabolic health.
比较24小时内重复进行下半身与上半身冲刺跑或耐力运动所产生的能量消耗和底物分配情况。
12名未经训练的男性（24±4岁）按随机顺序完成三项试验：（1）在自行车测功仪上进行重复冲刺跑（五次30秒温盖特测试，恢复4.5分钟）（SIT）；（2）以65%最大摄氧量进行50分钟持续骑行（END）；（3）在手臂曲柄测功仪上进行重复冲刺跑（SIT）。在运动前、运动期间以及恢复的22小时内的八个时间点评估呼吸气体交换情况。
SIT后前8小时的代谢率升高幅度大于SIT（升高0.8±1.1千焦/分钟，p=0.03），且有高于END的趋势（升高0.7±1.3千焦/分钟，p=0.08）。24小时总能量消耗（运动+恢复）在SIT和END之间（p = 0.55）以及SIT和SIT之间（p=0.13）相当，但SIT的24小时脂肪消耗量高于END（高26±3克，p=0.04）和SIT（高27±克，p=0.05），而SIT的碳水化合物消耗量高于SIT（高32±克，p=0.05）。运动后经血浆容量校正的空腹血糖和脂质浓度未发生变化。
尽管五次冲刺跑期间的能量消耗远低于50分钟持续运动，但24小时能量消耗并无显著差异。然而，（i）冲刺跑后的脂肪代谢更旺盛，（ii）上肢冲刺跑后数小时的碳水化合物代谢比下肢更旺盛，而24小时能量消耗相当。因此，上肢或下肢冲刺跑可能是促进代谢健康的重要辅助运动方式。
