![]() ![]() Additionally, it can also be seen that if Wâ² depletes to zero, then t lim also reaches zero and hence task failure is attained. Equation (1) can be conceptualized according to a hydraulic model (Margaria, 1976 Morton, 2006), whereby the value Wâ² progressively depletes during exercise whenever P > CP and reconstitutes when PWâ² = total work accumulated above CP until task failure, t lim = duration until task failure, P = power output, and CP = critical power, defined as a rate limited sustainable power output below which no net expenditure of Wâ² occurs. This enables the application of W BAL â² modelling to training prescription and competition analysis at altitude. ![]() However, W BALint â² was lower than 0 kJ at 250 m (â0.9 ± 1.3 kJ P = 0.058) and 2,250 m (â2.8 ± 2.8 kJ P = 0.02).Ĭonclusion: The altitude prediction equations for CP and Wâ² developed in this study are suitable for use with the W BAL â² model in acute hypoxia. W BALdiff â² returned higher values than W BALint â² throughout HIIT ( P < 0.001). predicted CP and Wâ²) on modelled W BAL â² at 2,250 m ( P = 0.24). There was no significant effect of parameter input (actual vs. A double-linear function characterized the effect of altitude on Wâ² ( R 2 = 0.99). Results: CP decreased at altitude ( P < 0.001) as described by 3rd order polynomial function ( R 2 = 0.99). Actual and predicted CP and Wâ² were used to compute Wâ² during HIIT using differential ( W BALdiff â²) and integral ( W BALint â²) forms of the W BAL â² model. A high-intensity intermittent test (HIIT) was performed at 250 and 2,250 m. Least squares regression was used to predict CP and Wâ² at altitude. Methods: Nine trained male cyclists completed cycling time trials (TT 12, 7, and 3 min) to determine CP and Wâ² at five altitudes (250, 1,250, 2,250, 3,250, and 4,250 m). Purpose: Develop a prediction equation for critical power (CP) and work above CP (Wâ²) in hypoxia for use in the work-balance ( W BAL â²) model. ![]()
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