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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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ASSESSMENT OF SUBJECTIVE PERCEIVED EXERTION AT THE ANAEROBIC THRESHOLD WITH THE BORG CR-10 SCALE |
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Antonio R. Zamunér1  ,
Marlene A. Moreno1, Taís M. Camargo1, Juliana P. Graetz1,
Ana C. S. Rebelo2, Nayara Y. Tamburús1 and Ester da
Silva1,2 |
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1College of Health Sciences, Methodist University of Piracicaba, Piracicaba-SP, Brazil, 2Federal University of São Carlos, São Carlos-SP, Brazil |
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© Journal of Sports Science and Medicine (2011) 10, 130 - 136 |
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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. |
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