Kilpatrick Marcus, Kraemer Robert, Bartholomew John, Acevedo Edmund, Jarreau Denise
School of Physical Education and Exercise Science, University of South Florida, Tampa, FL 33620, USA.
Med Sci Sports Exerc. 2007 Aug;39(8):1417-22. doi: 10.1249/mss.0b013e31806ad73c.
The purpose of the study was to compare affective responses for two bouts of cycle ergometry with differing duration and intensity, but equal total work in kilocalories.
Thirty-seven participants (20 male, 17 female, mean age 23.9 yr) completed a multistage cycle ergometer protocol to determine ventilatory threshold (VT) and peak oxygen consumption (mean = 34.9 mL.kg(-1).min(-1)). Two cycling trials were prescribed: 30 min at 85% of VT (50.1% VO2 reserve) and an average of 24 min at 105% of VT (64.7% VO2 reserve). The length of the 105% of VT bout was adjusted to yield equal total work in each exercise trial.
Using repeated-measures ANOVA, heart rate and exertion were significantly higher, and affective valence was significantly less positive (P < 0.01) for the higher-intensity, shorter-duration bout, with no differences in felt arousal (P > 0.05). Additionally, affective valence became less positive during the higher-intensity bout (P < 0.01) but not the lower-intensity bout (P > 0.05).
These data extend previous findings by showing that the decline in ratings of pleasure during higher-intensity exercise is not dependent on differences in total caloric expenditure. Additionally, results from this study support continued promotion of prescriptions that focus on exercise intensity that does not exceed the VT.
本研究的目的是比较两次不同持续时间和强度但千卡总功相等的自行车测功运动的情感反应。
37名参与者（20名男性，17名女性，平均年龄23.9岁）完成了一项多级自行车测功方案，以确定通气阈值（VT）和峰值耗氧量（平均 = 34.9 mL·kg⁻¹·min⁻¹）。规定了两次骑行试验：在VT的85%（50.1%的VO₂储备）下进行30分钟，以及在VT的105%（64.7%的VO₂储备）下平均进行24分钟。将VT的105%的运动时间进行调整，以使每次运动试验的总功相等。
使用重复测量方差分析，高强度、短持续时间的运动试验中心率和用力程度显著更高，情感效价显著更不积极（P < 0.01），而感觉兴奋程度无差异（P > 0.05）。此外，在高强度运动试验中情感效价变得更不积极（P < 0.01），而在低强度运动试验中则没有变化（P > 0.05）。
这些数据扩展了先前的研究结果，表明高强度运动中愉悦感评分的下降并不取决于总热量消耗的差异。此外，本研究结果支持继续推广专注于不超过通气阈值的运动强度的运动处方。
