- 作者：David M. Williams ; Hollie A. Raynor
- 关键词：Self-selected intensity ; Affective valence ; Physical-activity-intensity preference
- 刊名：Psychology of Sport and Exercise
- 出版年：2013
- 出版时间：September, 2013
- 年：2013
- 卷：14
- 期：5
- 页码：767-775
- 全文大小：289 K
Objective
To examine the independent effects of physical activity (PA) intensity and choice of PA intensity when comparing affective response to and relative preference for self-selected-intensity versus imposed higher intensity PA.Design
Within-subjects experiment.
Methods
Twenty-nine healthy, low-active women completed four PA bouts over two sessions. The first session consisted of a one-third mile self-selected-intensity treadmill walk during which the speed was recorded, but was not visible to the participants. The second session consisted of three, counterbalanced, one-third mile treadmill conditions: (a) self-selected intensity, (b) same intensity as recorded for the first-session-self-selected-intensity walk, but with the intensity imposed by the experimenter (i.e., yoked-self-selected intensity), and (c) intensity set at 20 % higher than the first-session-self-selected-intensity walk (imposed higher intensity). Acute affective valence (pleasure/displeasure) was recorded prior to, during, and following each walking bout. Preference for each walking intensity was assessed using a behavioral-choice paradigm.
Results
Contrary to hypotheses, there was no effect of condition on acute affective valence. However, consistent with hypotheses, there was a linear trend, F(1, 22)?=?11.00, p?=?.003, indicating preference in descending order from self-selected-intensity to yoked-self-selected-intensity to imposed higher intensity PA.
Conclusions
Both choice over the intensity and a lower intensity per se contributed to greater preference for self-selected-intensity over imposed higher intensity PA among healthy low-active women; however, there was no evidence to support the notion that affective response to PA mediated this relationship.