Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2011) 10, 130 - 136

Research article
Assessment of Subjective Perceived Exertion at the Anaerobic Threshold with the Borg CR-10 Scale
Antonio R. Zamunér1, , Marlene A. Moreno1, Taís M. Camargo1, Juliana P. Graetz1, Ana C. S. Rebelo2, Nayara Y. Tamburús1, Ester da Silva1, 2
Author Information
1 College of Health Sciences, Methodist University of Piracicaba, Piracicaba-SP, Brazil
2 Federal University of São Carlos, São Carlos-SP, Brazil

Antonio R. Zamunér
✉ College of Health Sciences, Methodist University of Piracicaba, Piracicaba-SP, Brazil
Email: beto.zam@gmail.com
Publish Date
Received: 14-09-2010
Accepted: 24-11-2010
Published (online): 01-03-2011
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ABSTRACT

The purpose of this study was to evaluate the anaerobic threshold (AT) with a graphic visual method for estimating the intensity of ventilatory and metabolic exertion and to determine the ratings of perceived exertion (RPE) on the Borg CR-10 scale during a continuous ramp type exercise test (CT-R). Forty healthy, physically active and sedentary young women (age 23.1 ± 3.52 years) were divided into two groups according to their fitness level: active group (AG) and sedentary group (SG) and were submitted to a CT-R on a cycloergometer with 20 to 25 W/min increments. Shortly before the end of each one-minute period, the subjects were asked to rate dyspnea (RPE-D) and leg fatigue (RPE-L) on the Borg CR-10 scale. After the AT was determined with the graphic visual method, the score that the volunteers gave on the Borg CR10 scale was verified. Data were analyzed using the Mann-Whitney and Spearman correlation tests with the significance level set at 5%. The mean ratings of RPE-L and RPE-D at the AT level were not significantly different between groups (p > 0.05). Significant correlations were found between VO2, heart rate (HR), power output and RPE for both groups. The muscular and respiratory RPE, according to the Borg CR-10 scale, were correlated with the AT, suggesting that scores close to 5, which correspond to a “strong” perception, may be used as parameters for quantifying aerobic exercise intensity for active and sedentary individuals. The similar perception of exercise intensity, which corresponded to the AT of different individuals, makes it possible to prescribe exercise at an intensity equivalent to the AT by means of the RPE.

Key words: Rating of perceived exertion, anaerobic threshold, exercise test


           Key Points
  • Interest in quantitative and systematic determination of the AT is growing, however, qualitative studies measure the AT by perceived exertion, are still unsubstantial.
  • Borg CR-10 scale is a category scale with ratio properties consisting of numbers related to verbal expressions, which allows rate comparison between intensities as well as a determination of intensity levels.
  • Scores close to 5 expressed on the Borg CR-10 scale, which correspond to a “strong” perception, may be used as parameters for quantifying the aerobic exercise intensity of both active and sedentary women.
 
 
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