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ABSTRACT:
The purpose of this study was to determine whether individuals having more accurate perceptions of exertion elect to pace themselves at a higher percentage of their physical working capacity when a task requires covering maximal distance in a fixed time interval. After being assessed on general activity level, height, weight VO2max and maximum heart rate, 22 college women were asked during a preliminary five minute trial on a bicycle ergometer to select a pace which would allow them to cover maximum distance on a susequent 25-minute ride. Resistance was set on the ergometer so that a subject pedaling at 80 rpms would be exercising at 70 percent of her predicted VO2max. During the last 15 seconds of the five minute ride average speed, rpms, and heart rate were monitored. Perceptions of exertion (i.e., RPE) for general and leg sensations were also assessed (a) after the preliminary ride, (b) before the impending 25-minute trial (e.i., estimate of future RPE), and (c) after the 25-minute trial. Heart rate and cycling rpms were monitored throughout. As hypothesized, those who elected to perform at a higher rate (i.e., greater rpms and greater percent of maximal heart rate) also seemed to have a more accurate idea of how they would feel after the 25-minute ride overall, and in their legs than subjects who worked at a lower physiological load. Considering that physical and physiological differences on the variables measured were minimal among the subjects in the present study, it was concluded that psychological factors, probably related to perceptual styles, played an important role in pacing decisions made by these individuals. Ongoing work is examining the factors of (a) augmentation-reductionism, (b) subject motivation, (c) general affect, and (d) association-dissociation as possible mediating variables.
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