出版社：Institut Nacional d´Educació Física de Catalunya (INEFC)
摘要：Introduction: the objective of this study is to identify the intensity of the maximal fat oxidation point (Fatmax) and its relationship to the first heart rate variability threshold (HRVT1).Subjects and methods.23 subjects (10 M; 13 W), BMI 24.3±3.1 kg/m2 , age 32±10 years, physically active (≥600 METS minute-week), performed an incremental step test on a cycloergometer.V · O2 , V · CO2 , HRV and fat oxidation were recorded for each stage.Measurements of central tendency, mean contrast, correlation coefficient and Bland-Altman plot analysis were used for the statistical analysis.Results.The values for Fatmax vs.HRVT1 were 48.7±7.1 vs.55.4±9.2 %V · O2 peak, 68±34 vs. 84±39 Watts, 112±14 vs.125±11 bpm and 1.25±.49 vs.1.41±.54 L·min-1; all intensities presented significant differences (p.05), correlations higher than .8, a bias of ≈3W and a good level of agreement with the values of Fatmax.Conclusion: there is correlation between HRVT1 and Fatmax in the V · O2 and Watts variables.The watts load of Fatmax can be identified using this relationship.
