Prediction equation to estimate heart rate at individual ventilatory threshold in female and male obese adults

Gian Pietro Emerenziani, Dafne Ferrari, Maria Grazia Vaccaro, Maria Chiara Gallotta, Silvia Migliaccio, Andrea Lenzi, Carlo Baldari and Laura Guidetti

PLOS ONE, 2018, vol. 13, issue 5, 1-13

Abstract: Objective: Prescribing individualized moderate exercise intensity is a useful method to reach positive effects on health status in obese adults. This study aimed to establish a practical reference equation to estimate the heart rate (HR) at individual ventilatory threshold (IVT) (HRIVT). Methods: One hundred sixty-one obese subjects were clinically evaluated and characterized by anthropometric and body composition. Participants performed the six-minute walking test (6-MWT) and the cardiopulmonary exercise test to assess IVT. Multiple regression analysis for HRIVT, including 6-MWT, anthropometric, and body composition parameters, as independent variables, was performed for both gender separately. A cross-validation study was also performed to determine the accuracy of the prediction equation. Results: Whereas HRIVT was not significantly different between males (121.5±18.3 bpm) and females (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 and males, respectively). Conclusion: In conclusion, in female and male obese adults, the 6-MWT might be used to predict HR at IVT. These outcomes are useful to prescribe optimal physical activity intensity when gold standard methods (e.g. gas exchange analysis) are unavailable.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0197255

DOI: 10.1371/journal.pone.0197255

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