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- Title
Power-cadence relationship in endurance cycling.
- Authors
Emanuele, Umberto; Denoth, Jachen
- Abstract
In maximal sprint cycling, the power-cadence relationship to assess the maximal power output ( P) and the corresponding optimal cadence ( C) has been widely investigated in experimental studies. These studies have generally reported a quadratic power-cadence relationship passing through the origin. The aim of the present study was to evaluate an equivalent method to assess P and C for endurance cycling. The two main hypotheses were: (1) in the range of cadences normally used by cyclists, the power-cadence relationship can be well fitted with a quadratic regression constrained to pass through the origin; (2) P and C can be well estimated using this quadratic fit. We tested our hypothesis using a theoretical and an experimental approach. The power-cadence relationship simulated with the theoretical model was well fitted with a quadratic regression and the bias of the estimated P and C was negligible (1.0 W and 0.6 rpm). In the experimental part, eight cyclists performed an incremental cycling test at 70, 80, 90, 100, and 110 rpm to yield power-cadence relationships at fixed blood lactate concentrations of 3, 3.5, and 4 mmol L. The determined power outputs were well fitted with quadratic regressions ( R = 0.94-0.96, residual standard deviation = 1.7%). The 95% confidence interval for assessing individual P and C was ±4.4 W and ±2.9 rpm. These theoretical and experimental results suggest that P, C, and the power-cadence relationship around C could be well estimated with the proposed method.
- Subjects
CADENCE (Cycling); PHYSIOLOGICAL aspects of cycling; ANAEROBIC threshold; REGRESSION analysis; CYCLIST physiology
- Publication
European Journal of Applied Physiology, 2012, Vol 112, Issue 1, p365
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-011-1987-z