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Individual differences in perceived exertion assessed with the Borg RPE, CR10 and CR100 scales

Year: 2007
Type: article
Abstract: Borg’s RPE, CR10 and CR100 scales were compared during bicycle ergometer work. The experiment of perceived exertion has the advantage that the scales can be validated against good physiological correlates at the individual level. Two experiments were conducted, one with 24 men and 16 women, and the other with 12 men and 12 women. Heart rates (HR) and blood lactates ([La–]) were used as physiological correlates. Mean exponents of the psychophysical power functions for men were between 1.2 and 1.4 and for women between 1.1 and 1.5 (CR10 and CR100 data). No significant differences were found between men’s and women’s exponents. Men had significantly lower slopes than women for RPE data, as well as for HR, as a function of power (Watt) on the bicycle ergometer, reflecting their larger physical working capacity. For the pre-chosen exponent, n = 1.6, the same was true for the CR10 and the CR100 scales. Mean slopes for women were between 60% and 80% of the mean slopes for men (HR, RPE and CR data). The correlations were typically high, above 0.7, between individual scale values and physiological correlates. According to stepwise regression, both HR and [La–] contributed to the individual CR values, but to a varying degree for different participants. All three scales of perceived exertion, all predicted the individual working capacity well. ANOVA showed that the three scales differentiated four groups of self-rated physical fitness with regard to individual working capacity. Predictions of individual working capacity in Watt on the bicycle ergometer obtained from psychophysical functions deviated from performed individual working capacity by only a few Watt and were more accurate than predictions made from HR-functions. The results promote a more extended use of CR scales for individual assessment of perceived exertion and diagnostics of physical fitness.
Language: English
Field: Medicine
Open Access status: green
OpenAlex ID: W187152501
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