Patterning of physiological and affective responses during a graded exercise test in sedentary men and boys
Date
2008
Authors
Shepphard, K.
Parfitt, C.G.
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Journal article
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Journal of Exercise Science & Fitness, 2008; 6(2):121-129
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Understanding the impact of acute bouts of exercise on affective valence responses is potentially very important, as the affective response may determine the exercise intensity-adherence relationship. This study examined the relationship between exercise intensity and affective responses in two different sedentary populations via a graded maximal exercise test (GXT). All participants completed two GXTs, set approximately 1 week apart. During the test, at the end of every incremental step, participants reported their activation, affective valence and perceived exertion assessed with the Borg 6-20 Rating of Perceived Exertion (RPE) or Cart and Load Effort Rating (CALER) scale. Patterning of responses was examined using separate repeated measures analyses of variance, looking for linear and nonlinear trends in % HRpeak, RPE/CALER, activation and affective valence. Significant (quadratic) increases in % HRpeak, perceived exertion and activation were found in both groups. Affective valence showed a significantly curvilinear decline after the ventilatory threshold (VT) in both groups. However, the men's data showed a significant curvilinear decline in affective valence from the onset of exercise until the point of VT, a pattern not present in the boys. The data show that exercise above the VT brings about significant declines in affective valence, although it is important to recognize that the interindividual differences and variations in the magnitude of responses were large. Boys and men were found to respond affectively in a similar manner to exercise intensity above the VT but not below the VT.
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Copyright 2008 Elsevier