Abstract
When facing a long-distance race, athletes and practitioners could develop an efficient pacing strategy and training paces if an accurate performance estimate of the target distance is achieved. Therefore, this study aims to determine the validity of different empirical models (i.e. critical power [CP], Power law and Peronnet) to predict long-duration power output (i.e. 60 min) when using two or three time trial configurations. In a 5-week training period, fifteen highly trained athletes performed nine-time trials (i.e. 1, 2, 3, 4, 5, 10, 20, 30, and 60 min) in a randomized order. Their power-duration curves were defined through the work-time (CPwork), power-1/time (CP1/time), two-parameter hyperbolic (CP2hyp), three-parameter hyperbolic (CP3hyp) CP models using different two- and three–time trial configurations. The undisclosed proprietary CP models of the Stryd (CPstryd) and Golden Cheetah training software (CPcheetah) were also computed as well as the non-asymptotic Power law and Peronnet models. These were extrapolated to the 60-min power output and compared to the actual performance. The shortest valid configuration (95% confidence interval < 12 W) for CPwork and CP1/time was 3–30 min (Bias: 8.3 [4.9 to 11.7] W), for CPstryd was 10–30 min (Bias: 4.2 [− 1.0 to 9.4] W), for CP2hyp, CP3hyp and CPcheetah was 3-5-30 min (Bias < 5.7 W), for Power law was 1-3-10 min (− 1.0 [− 11.9 to 9.9] W), and for Peronnet was 4–20 min (− 3.0 [− 10.2 to 4.3] W). All the empirical models provided valid estimates when the two or three predicting trial configurations selected attended each model fitting needs.
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The data supporting the findings are not publicly available. Any raw data would be shared upon reasonable request from the corresponding author.
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Acknowledgements
This study is part of a PhD thesis conducted in the Biomedicine Doctoral Studies of the University of Granada, Spain.
Funding
The funding was provided by Ministerio de Universidades, FPU19/00542, Santiago Alejo Ruiz Alias. This project was supported by the Andalusian Sports Institute (Instituto Andaluz del Deporte, ref. 5562) in addition to the Ministerio de Universidades (FPU19/00542) that only belongs to Santiago A. Ruiz-Alias.
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SARA, AAÑA, APC and FGP were involved in the concept design, data collection, manuscript preparation and final approval.
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Communicated by Michael I Lindinger.
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Ruiz-Alias, S.A., Ñancupil-Andrade, A.A., Pérez-Castilla, A. et al. Can we predict long-duration running power output? A matter of selecting the appropriate predicting trials and empirical model. Eur J Appl Physiol 123, 2283–2294 (2023). https://doi.org/10.1007/s00421-023-05243-y
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DOI: https://doi.org/10.1007/s00421-023-05243-y