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Critical Power Is More Strongly Associated With Rowing Performance Than the Second Lactate Threshold.

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Critical power (CP) and second lactate threshold methods show strong associations with rowing performance, with the CP model accurately predicting 2000-m rowing times in trained athletes.

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Area of Science:

  • Sports Physiology
  • Exercise Science

Background:

  • Critical Power (CP) and second lactate threshold are key physiological markers for endurance performance.
  • Understanding the agreement and predictive accuracy of these markers is crucial for training optimization in rowers.

Purpose of the Study:

  • To assess the agreement between Critical Power (CP) and the second lactate threshold (using ModDmax and LogPoly methods) in rowers.
  • To examine the relationship between these physiological markers and rowing performance.
  • To evaluate the accuracy of the CP model in predicting 2000-m rowing performance.

Main Methods:

  • Retrieved data from 38 national/international level male and female rowers.
  • Determined the second lactate threshold using modified Dmax (ModDmax) and LogPoly methods during an incremental ergometer test.
  • Calculated CP and work above CP (W') using time-trial data (500m, 2000m, and 5000m/6000m) and the linear 1/time model.

Main Results:

  • Moderate to strong associations (r² = .49-.70) were found between CP, ModDmax, and LogPoly.
  • Power output at CP was lower than at ModDmax and LogPoly (P < .001).
  • CP demonstrated the strongest association with rowing performance (r² = -.81; P < .001), followed by ModDmax and LogPoly (r² = -.75; P < .001).
  • The CP model, including W', accurately predicted 2000-m rowing time (male r² = .92, female r² = .81; P < .001).

Conclusions:

  • While absolute power output agreement was not confirmed, strong associations exist between CP, ModDmax, and LogPoly.
  • All tested methods showed moderate to high correlations with 2000-m rowing performance.
  • The CP model is a valid tool for predicting rowing performance in trained athletes.