Hallworth Jillian R, Copeland Jennifer L, Doan Jon, Hazell Tom J
Department of Kinesiology and Physical Education, University of Lethbridge, Lethbridge, AB, Canada T1K 3M4.
Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON, Canada N2L 3C5.
J Nutr Metab. 2017;2017:4823102. doi: 10.1155/2017/4823102. Epub 2017 Feb 13.
We compared the acute response of anorexigenic signals (total PYY and GLP-1) in response to submaximal and supramaximal exercise. Nine females completed three sessions: (1) moderate-intensity continuous training (MICT; 30 min; 65% VO); (2) sprint interval training (SIT; 6 × 30 sec "all-out" cycling sprints with 4 min recovery); or (3) control (CTRL; no exercise). PYY and GLP-1 were measured via blood samples drawn before, immediately after, and 90 min after exercise. Perceptions of hunger were rated using a visual analogue scale at all blood sampling time points. There was a session × time interaction for GLP-1 ( = 0.004) where SIT and MICT ( < 0.015 and < 0.001) were higher compared to CTRL both immediately and 90 min after exercise. There was a main effect of time for PYY where 90 min after exercise it was decreased versus before and immediately after exercise. There was a session × time interaction for hunger with lower ratings following SIT versus MICT ( = 0.027) and CTRL ( = 0.031) 90 min after exercise. These results suggest that though GLP-1 is elevated after exercise in women, it is not affected by exercise intensity though hunger was lower 90 min after exercise with SIT. As the sample size is small further study is needed to confirm these findings.
我们比较了厌食信号（总肽YY和胰高血糖素样肽-1）对次最大强度和超最大强度运动的急性反应。九名女性完成了三个阶段：（1）中等强度持续训练（MICT；30分钟；65%VO₂）；（2）短跑间歇训练（SIT；6次×30秒“全力”自行车冲刺，恢复4分钟）；或（3）对照（CTRL；不运动）。在运动前、运动后即刻和运动后90分钟采集血样，测定肽YY和胰高血糖素样肽-1。在所有血样采集时间点，使用视觉模拟量表对饥饿感进行评分。胰高血糖素样肽-1存在阶段×时间交互作用（P = 0.004），其中SIT和MICT组（P < 0.015和P < 0.001）在运动后即刻和90分钟时均高于CTRL组。肽YY存在时间主效应，运动后90分钟时与运动前和运动后即刻相比有所下降。饥饿感存在阶段×时间交互作用，运动后90分钟时SIT组的评分低于MICT组（P = 0.027）和CTRL组（P = 0.031）。这些结果表明，尽管运动后女性体内的胰高血糖素样肽-1升高，但它不受运动强度的影响，不过SIT运动后90分钟时饥饿感较低。由于样本量较小，需要进一步研究来证实这些发现。
