Prediction of Exercise Tolerance in the Severe and Extreme Intensity Domains by a Critical Power Model

This study aimed to assess the predictive capability of different critical power (CP) models on cycling exercise tolerance in severe- and extreme-intensity domains. Nineteen cyclists (age: 23.0 ± 2.7 y) performed several time-to-exhaustion tests (Tlim) determine CP, finite work above CP (W'), highest constant rate at which maximal oxygen consumption was attained (IHIGH). Hyperbolic power-time, linear power-inverse time, work-time with three trials were used W'. Modeling two model also Actual IHIGH intensity 5% (IHIGH+5%) compared those predicted by all models. (155 30 s) IHIGH+5% (120 26 performances not from trials. overestimated Tlim (129 33 s; p = 0.04). Bland-Altman plots presented significant heteroscedasticity predictions, but for IHIGH. Exercise severe extreme domains can be derived However, this ability is impaired within domain.