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Relationship between functional threshold power, ventilatory threshold and respiratory compensation point in road
Sebastian Sitko1, Rafel Cirer-Sastre2, Francisco Corbi2
1Section of Physical Education and Sports, Department of Physiatry and Nursery, Faculty of Health and Sport Sciences, University of Zaragoza, Huesca, Spain - sitko@unizar.es.
Background:
The purpose of this study was to assess the relationship between power output and relative power output at the functional threshold power, ventilatory threshold and respiratory compensation point in road cyclists.
Methods:
Forty-six road cyclists (age 38±9 years; height 177±9 cm; body mass 71.4±8.6 kg; Body Mass Index 22.7±2.2 kg·m-1; fat mass 7.8±4%, V̇O
Results:
Power output and relative power output at the functional threshold power were higher than at the ventilatory threshold (P<0.001). There were very large to near perfect correlations for power output (95% CI for r from 0.71 to 0.9) and relative power output (95% CI for r from 0.79 to 0.93) at the functional threshold power and respiratory compensation point. Mean bias in power output and relative power output measured at RCP compared with FTP was not significant (mean bias 95% CI from -7 to 10 W and -0.1 to 0.1 W/kg, respectively).
Conclusions:
Power output and relative power output at the functional threshold power are higher than at the ventilatory threshold. Power output and relative power output at the functional threshold power and respiratory compensation point are strongly related, but caution is required when using both concepts indistinctly.
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