title: Changes in ratings of perceived exertion and psychological affect in the early stages of exercise.
abstract: The purpose of this study was to examine differences in the rating of perceived exertion (RPE) and affect, as assessed by a bipolar feeling scale (FS) during cycle ergometry in a steady-state and a nonsteady-state condition in active and inactive individuals. 71 subjects completed a self-report questionnaire on physical activity and were assigned to two groups, a low-active group of 16 men and 18 women and a high-active group of 18 men and 19 women. On Day 1 all subjects completed a sub-maximal exercise test to predict maximum oxygen uptake (VO2max) from which work rates corresponding to 60% and 90% VO2max were calculated. On Day 2 half of the subjects completed a work rate equivalent to 60% VO2max whilst the other half completed a 90% VO2max work rate. On Day 3 alternative work rates were completed. RPE and FS were recorded after 2 and 4 min, at each work rate on both days. Mixed-model, 4-factor (gender x group x work rate x time) analyses of variance with repeated measures on work rate and time were conducted on the FS and RPE data. RPE was higher after 4 min, at both intensities, and there was a greater increase in RPE between 2 and 4 min, at the 90% than the 60% work rate. Rated feeling was more positive at the 60% work rate, high-active subjects were more positive than low-active subjects and rated feeling was lower in Minute 4 for both groups. The following interactions were observed: rated feeling was more negative after 4 min. for the low-active group compared to the high-active group at 2 and 4 min. and the low-active group reported more negative feeling at the 90% work rate compared to the 60% work rate while the high-active group did not change significantly. Timing of the RPE is important if used to prescribe exercise intensity. Further, low-active subjects should be encouraged to exercise at moderate intensities and discouraged from focusing on how they feel immediately before they finish a session.
authors.affiliation: Division of Health and Human Performance University of Wales.
authors.forename: G
authors.initials: G
authors.lastname: Parfitt
authors.forename: R
authors.initials: R
authors.lastname: Eston
mesh_terms: D000328:Adult; D000339:Affect; D016552:Ergometry; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D013997:Time Factors