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Agreement Between Lab- and Field-Derived Sprint Power Reserve in U23 Elite Cyclists.

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The sprint power reserve model accurately predicts cycling power output from both lab and field tests. These predictions are reliable for practitioners, enhancing training strategies.

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Cycling Performance Analysis

Background:

  • The sprint power reserve (SPR) model is used to predict high-intensity cycling power output.
  • Evaluating SPR model accuracy under laboratory and field conditions is crucial for practical application.

Purpose of the Study:

  • To assess the predictive capability of the SPR model in severe and extreme intensity domains.
  • To compare SPR model predictions from laboratory and field settings against actual mean maximum power outputs (MMPs).

Main Methods:

  • Ten male U23 cyclists underwent laboratory incremental and 10-second sprint tests, plus field 3-minute and 10-second sprint tests.
  • Predictions from laboratory (PREDLAB) and field (PREDFIELD) conditions were compared to field-recorded MMPs using Bland-Altman analysis across various durations.

Main Results:

  • No significant differences were observed between lab and field sprint tests or between the 3-minute field test and laboratory peak power.
  • The SPR model's time constant (k=0.027) showed excellent fit to MMP (R2 = .98).
  • Most PREDLAB and PREDFIELD predictions were within 95% limits of agreement with MMP, except for PREDFIELD at 150 seconds.

Conclusions:

  • SPR model predictions derived from both laboratory and field conditions demonstrate comparable reliability.
  • The SPR model is a reliable tool for practitioners to predict high-intensity power output with confidence.