Key result
Submaximal METs/RPE ratio accurately predicts peak exercise capacity in coronary artery disease patients.
Why the study?
It was unclear whether a rating of perceived exertion scale obtained during submaximal exercise could predict peak exercise capacity in coronary artery disease patients.
Does a rating of perceived exertion scale (RPE) obtained during submaximal exercise predict peak exercise capacity (METpeak) in coronary artery disease patients?
Cross-Sectional (n=166)
No
Does a rating of perceived exertion scale (RPE) obtained during submaximal exercise predict peak exercise capacity (METpeak) in coronary artery disease patients?
Effect estimate: r = 0.86
p-value: p=<0.0001
A model based on easily measured variables at rest and during submaximal exercise can reasonably predict absolute peak exercise capacity in patients with CAD.
Supports submaximal RPE-METs prediction of peak capacity in CAD; hypothesis-generating and requires prospective validation before practice change.
The purpose of this study was to determine whether a rating of perceived exertion scale (RPE) obtained during submaximal exercise could be used to predict peak exercise capacity (METpeak) in coronary artery disease (CAD) patients. Angiographically documented CAD patients (n = 124, 87% on β blockade) completed a symptom-limited peak exercise test on a bicycle ergometer, reporting RPE values at every second load on a scale of 6-20. Regression analysis was used to develop equations for predicting METpeak. We found that submaximal METs at a workload of 60/75 W (for women and men, respectively) and the corresponding RPE (METs/RPE ratio) was the most powerful predictor of METpeak (r = 0.67, p < 0.0001). The final model included the submaximal METs/RPE ratio, body mass index (BMI), sex, resting heart rate, smoking history, age, and use of a β blockade (r = 0.86, p < 0.0001, SEE 0.98 METs). These data suggest that RPE at submaximal exercise intensity is related to METpeak in CAD patients. The model based on easily measured variables at rest and during "warm-up" exercise can reasonably predict absolute METpeak in patients with CAD.
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Hautala et al. (2013) conducted a cross-sectional in Coronary artery disease (n=166). Submaximal exercise test with Rating of Perceived Exertion (RPE) vs. Symptom-limited peak exercise test (measured METpeak) was evaluated on Correlation between predicted and measured peak exercise capacity (METpeak) (r = 0.86, p=<0.0001). A prediction model based on submaximal exercise METs/RPE ratio and clinical variables strongly predicted measured peak exercise capacity in patients with coronary artery disease (r = 0.86, p < 0.0001).
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