KNES 350 Lecture 2: KNES350 Exam 2 Notes.docx
1 Mar 2015
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Perceived exertion: what is perceived exertion, one"s subjective feeling of strain or effort during physical work, perception represents an integration, or gestalt, of many different signals from different physiological, psychological and environmental sources, psychophysics and perceived exertion, psychophysics: psychological appraisal of the physical world, sensation: stimulation of sensory nerve fibers due to a physical stimulus, perception: cognitive interpretation of sensations, modern psychophysics. Work increases linearly, perception of how hard work feels grows: borg"s modified power law: r = a + c (s b)n exponentially, a: tonic level of perceived exertion at rest, no work is being performed, b: stimulus threshold, borg"s range principle. Instructions for the rpe scales o: define perceived exertion, describe the scale, anchor the perceptual range, specify overall or differentiated ratings, what signals contribute to perceptions of exertion, respiratory metabolic mediators, encourage accurate and honest responses, ventilatory drive, respiratory rate, indicators:
