Development and field validation of an omni-domain power-duration model.

Puchowicz, Michael J.; Baker, Jonathan; Clarke, David C.

Purpose: To validate and compare a novel model based on the critical power (CP) concept that describes the entire domain of maximal mean power (MMP) data from cyclists. Methods: An omni-domain power-duration (OmPD) model was derived whereby the rate of Wʹ expenditure is bound by maximum sprint power and the power at prolonged durations declines from CP log-linearly. The three-parameter CP (3CP) and exponential (Exp) models were likewise extended with the log-linear decay function (Om3CP and OmExp). Each model bounds Wʹ using a different nonconstant function, Wʹeff (effective Wʹ). Models were fit to MMP data from nine cyclists who also completed four time-trials (TTs). Results: The OmPD and Om3CP residuals (4 ± 1%) were smaller than the OmExp residuals (6 ± 2%; P < 0.001). Wʹeff predicted by the OmPD model was stable between 120–1,800 s, whereas it varied for the Om3CP and OmExp models. TT prediction errors were not different between models (7 ± 5%, 8 ± 5%, 7 ± 6%; P = 0.914). Conclusion: The OmPD offers similar or superior goodness-of-fit and better theoretical properties compared to the other models, such that it best extends the CP concept to short-sprint and prolonged-endurance performance.

ATHLETES; ATHLETIC ability; CYCLING; EXERCISE tests; GOODNESS-of-fit tests; PHYSICAL fitness; PROBABILITY theory; RESEARCH evaluation; ANAEROBIC threshold; EXERCISE intensity; STATISTICAL models; DESCRIPTIVE statistics

Journal of Sports Sciences, 2020, Vol 38, Issue 7, p801

0264-0414

Academic Journal

10.1080/02640414.2020.1735609