Gaby M. Wolff

Publication Date


Document Type


Degree Name

M.S. Ed. (Master of Education)

Legacy Department

Department of Kinesiology and Physical Education


University of Illinois at Chicago; Swimmers--Physiology; Swimming--Physiological aspects; Swimming--Illinois--Chicago


The purposes o f this study were to a) report the test-retest reliability and validity o f Borg's RPE and CR-10 scales o f perceived exertion; b) describe the relationships between perceptual intensity, mechanical exercise intensity, and physiological exercise intensity; and c) determine if the established transformation chart accurately reflects values from one scale to another in untethered freestyle swimming in trained swimmers. Group 1, the RPE group, N = 16 (M =9, F =7), completed two trials using Borg’s RPE scale, and group 2, the CR-10 group, N =15 (M =9, F = 6), completed two trials using Borg’s CR-10 scale on separate days. Group 3, the RPE/CR-10 group, N = 17 (M=10, F = 7), completed one RPE and one CR-10 trial. Each trial consisted o f five repetitions o f 200 yards at 4:30 intervals. Intraclass reliability (R) was determined to be .94 for the RPE and .95 for the CR-10 scales. Concurrent validity was established for both the RPE scale (HR: r=.73; velocity: r=.62) and CR-10 scale (HR:r=.62; velocity:r=.66). Regression analysis of the raw data revealed that the relationships between RPE and velocity, power, and HR, were rectilinear, but the relationship between RPE and BLC was negatively accelerating curvilinear. The relationships between CR-10 and velocity, HR. and BLC were rectilinear, whereas the relationship between CR-10 and power was positively accelerating curvilinear. Regression analysis using geometric means showed similar patterns with two exceptions: CR-10 versus power showed a ABSTRACT rectilinear relationship and CR-10 versus BLC showed a positively accelerating curvilinear relationship. T- tests revealed no statistically significant difference between the original score from the CR-10 scale and the transformed scores from the RPR scale for sets 3, 4. and 5, but there were significant differences for sets 1 and 2. It was concluded that both or either the RPE and CR-10 scales are valid and reliable for rating perceived exertion in freestyle swimming. However, because the patterns o f response varies among variables and because the transformation scale does not appear to be valid at low intensity, it is suggested that either one or the other scale be used in practice for any given trained swimmer.


Includes bibliographical references (pages [54]-57, [99]-102)


viii, 151 pages




Northern Illinois University

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