Objective Prescribing individualized moderate exercise intensity is a useful method to reach positiveeffects on health status in obese adults. This study aimed to establish a practical referenceequation to estimate the heart rate (HR) at individual ventilatory threshold (IVT) (HRIVT).MethodsOne hundred sixty-one obese subjects were clinically evaluated and characterized byanthropometric and body composition. Participants performed the six-minute walking test(6-MWT) and the cardiopulmonary exercise test to assess IVT. Multiple regression analysisfor HRIVT, including 6-MWT, anthropometric, and body composition parameters, as independentvariables, was performed for both gender separately. A cross-validation study wasalso performed to determine the accuracy of the prediction equation.ResultsWhereas HRIVT was not significantly different between males (121.5±18.3 bpm) andfemales (117.6±17.1 bpm), it differently correlated with physical and performance parameters.Therefore, two sex-specific equations were developed including 6-MWTHR and HRrest(R2 = 0.69 and 0.65 and root mean square errors of 8.8 and 10.1 bpm for females andmales, respectively).ConclusionIn conclusion, in female and male obese adults, the 6-MWT might be used to predict HR atIVT. These outcomes are useful to prescribe optimal physical activity intensity when goldstandard methods (e.g. gas exchange analysis) are unavailable.
Prediction equation to estimate heart rate at individual ventilatory threshold in female and male obese adults. PLoS One
Ferrari D;
2018-01-01
Abstract
Objective Prescribing individualized moderate exercise intensity is a useful method to reach positiveeffects on health status in obese adults. This study aimed to establish a practical referenceequation to estimate the heart rate (HR) at individual ventilatory threshold (IVT) (HRIVT).MethodsOne hundred sixty-one obese subjects were clinically evaluated and characterized byanthropometric and body composition. Participants performed the six-minute walking test(6-MWT) and the cardiopulmonary exercise test to assess IVT. Multiple regression analysisfor HRIVT, including 6-MWT, anthropometric, and body composition parameters, as independentvariables, was performed for both gender separately. A cross-validation study wasalso performed to determine the accuracy of the prediction equation.ResultsWhereas HRIVT was not significantly different between males (121.5±18.3 bpm) andfemales (117.6±17.1 bpm), it differently correlated with physical and performance parameters.Therefore, two sex-specific equations were developed including 6-MWTHR and HRrest(R2 = 0.69 and 0.65 and root mean square errors of 8.8 and 10.1 bpm for females andmales, respectively).ConclusionIn conclusion, in female and male obese adults, the 6-MWT might be used to predict HR atIVT. These outcomes are useful to prescribe optimal physical activity intensity when goldstandard methods (e.g. gas exchange analysis) are unavailable.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
