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Cycling Power Outputs Predict Functional Threshold Power and Maximum Oxygen Uptake.

Joshua Denham1, John Scott-Hamilton2, Amanda D Hagstrom1

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Cycling power outputs effectively predict functional threshold power (FTP) and maximum oxygen uptake (V[Combining Dot Above]O2max). These findings suggest simpler tests can accurately estimate these key physiological markers for cyclists.

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Cycling Performance

Background:

  • Functional threshold power (FTP) is a key metric for cyclists, correlating with lactate threshold and guiding training.
  • Accurate assessment of FTP and maximal oxygen uptake (V[Combining%20Dot%20Above]O2max) is crucial for optimizing performance and training programs.
  • Traditional methods for assessing these metrics can be time-consuming and require specialized equipment.

Purpose of the Study:

  • To determine if traditional aerobic and anaerobic cycling tests can predict FTP and V[Combining%20Dot%20Above]O2max.
  • To evaluate the accuracy and sensitivity of prediction equations for FTP and V[Combining%20Dot%20Above]O2max.
  • To assess the utility of these predictions in detecting exercise-induced physiological changes.

Main Methods:

  • Analysis of associations between estimated FTP, V[Combining%20Dot%20Above]O2max, and power outputs from maximal cycle ergometry cardiopulmonary exercise tests (CPET) and 30-second Wingate tests.
  • Inclusion of a heterogeneous cohort of 40 trained and untrained individuals.
  • Assessment of prediction equation accuracy and sensitivity in 11 young men before and after a 6-week sprint interval training intervention.

Main Results:

  • Moderate-to-strong positive correlations (r = 0.39-0.965, p ≤ .05) were found between FTP, relative V[Combining%20Dot%20Above]O2max, and power outputs from incremental and Wingate tests.
  • Maximum power during incremental cycling (Pmax) and relative V[Combining%20Dot%20Above]O2max predicted FTP (r = 0.93).
  • Age and FTP predicted relative V[Combining%20Dot%20Above]O2max (r = 0.80), and prediction models were sensitive to exercise-induced changes.

Conclusions:

  • FTP is primarily reliant on aerobic metabolism.
  • Cycling power outputs from maximal cycle ergometry CPET and 30-second Wingate tests can reliably predict FTP and V[Combining%20Dot%20Above]O2max.
  • A 20-minute FTP test offers a practical alternative for assessing V[Combining%20Dot%20Above]O2max, especially for professionals lacking CPET equipment.