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oai:www.ideals.illinois.edu:2142/22616 2023-07-10 col_2142_5131 col_2142_16278 com_2142_5130 com_2142_16277 com_2142_9614

McAuley, Edward Rudolph, David Leslie 2011-05-07T13:45:37Z 2011-05-07T13:45:37Z 10000-01-01 1994 Although it is well documented that exercise participation is associated with affective benefits, the mechanisms underlying this relationship are not clearly understood. The purpose of the present study was to take a psychobiological approach to the investigation of exercise-related affect. Specifically, the relationships between physical activity level, self-efficacy, cortisol responses, and affective change associated with an acute bout of treadmill running were examined. Subjects for the study comprised 60 (50 male; 10 female) undergraduate students who participated in a 30 minute treadmill trial at 60% VO$\sb{2\rm max}$. The results indicated that physically active subjects demonstrated enhanced affective responses compared to less active subjects. Also, active subjects possessed higher levels of self-efficacy (p $<$.001) pre- and post-exercise compared to their less active counterparts. Furthermore, post-exercise cortisol levels were lower in the physically active subjects (p $<$.05). With respect to the relationships among the variables in the study, it was found that (a) activity level predicted affective responses during exercise and was related to enhanced affective change post-exercise, (b) activity level predicted cortisol levels during exercise and was inversely related to cortisol level post-exercise, (c) low cortisol levels were related to higher self-efficacy post-exercise, (d) enhanced affective responses during exercise were related to lower cortisol levels post-exercise, and finally (e) self-efficacy predicted affective responses during exercise and was related to enhanced affective responses post-exercise. Many of the findings were interpreted and discussed within Bandura's (1986) social cognitive framework which postulates mastery experiences to impact upon perceptions of personal capabilities, which in turn will be related to affective states. Moreover, a tenet of Dienstbier's (1989) model of physiological toughness was tested. The tenet states that regular aerobic exercise results in suppressed cortisol responses to exercise, which in turn will be related to enhanced emotional function. In conclusion, the findings of the study suggest that affective changes associated with acute exercise are most likely determined by the interaction of psychological and physiological processes. Made available in DSpace on 2011-05-07T13:45:37Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9503304.pdf: 6731525 bytes, checksum: d2b91a42c1c0718c4359ff8daebf08db (MD5) Previous issue date: 1994 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:58:50Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:27:42-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9503304 (UMI)AAI9503304 http://hdl.handle.net/2142/22616 eng Copyright 1994 Rudolph, David Leslie Psychology, Psychobiology Education, Physical A psychobiological approach to the investigation of exercise-related affect text Kinesiology and Community Health Kinesiology and Community Health University of Illinois at Urbana-Champaign Dissertation Ph.D.