D16p Free Communication/Poster Psychology
The purpose of this study was to examine mood before and after exercise in habitual exercisers and nonexercisers. The exercisers consisted of individuals (4 males, 4 females) who participated in aerobic exercise more than 15 times per month for at least 6 months prior to participation. The nonexercisers were individuals (4 males, 4 females) who exercised less than 5 times per month for the previous 6 months. Mood was assessed using the Profile of Mood States (POMS) before and 5 min after 30 min of rest or treadmill exercise of varying intensities and durations. Subjects completed the conditions in randomized order at the same time of day and with no less than 48 hours separating each test. Results showed that total mood scores on the POMS were significantly improved among the exercisers after exercising for 10 min at 75% maximal oxygen uptake (VO2max) (p < 0.01), 30 min at 50% VO2max (p < 0.05), and 30 min at 75% VO2max (p < 0.01), but there was no statistically significant effect of exercise in the nonexercisers. Although the changes in total mood induced by 30 min of rest did not differ between the exercisers and nonexercisers, the changes in total mood after exercise for all intensities and durations were significantly different for the two groups. The correlation between VO2max and change in total mood score was significant (p = 0.02), although the r2 value of 0.109 indicates that little of the change in total mood was attributable to differences in VO2max. In conclusion, alterations in mood following an acute bout of exercise appear to be related to exercise history. Supported by Rehabilitation R & D Service of the Department of Veterans Affairs and the Physical Medicine Research Foundation's Woodbridge Grants and Awards Program.