Improving Models Of The Relationship Between Velocity And Time To Fatigue In Elite Rightman Rowing

Introduction: In accordance with the Critical Power (Critical Velocity, CV) concept the mathematical models were applied to describe the relationship between velocity and time to fatigue, and to evaluate the aerobic and anaerobic capacity of rowers in rowing ergometer data. A new method has provided for carrying out physical efficiency tests and training in rowing. There are three different CV models that including the two-parameter hyperbolic model, the three-parameter hyperbolic model and the three-parameter exponential model. Purpose: The purposes of this study were to verify the modeling from using 250m to 2000m predicting trials in rowing ergometry, and to evaluate different CV models applied to rowing ergometry, and to investigate prediction of performance time in a 2000m race based on results from shorter trials. Methods: Eleven elite lightman rowers performed six rowing ergometer tests. Estimates of time to fatigue, average power, heart rate and blood lactate derived from each trial have been compared. Velocity and time to fatigue data from the 250m to 1500m trials and from 250m to 2000m trials were fit to the three different models respectively. Results: The variance in time to fatigue, average power, heart rate and blood lactate verify the modeling in this paper. Including data from the 2000m predicting trial generally resulted in smaller SEE (Std. Error of the Estimate) and higher R2, and did affect parameter estimates, such as CV, AWC (anaerobic work capacity) or A and Vmaximal (the highest possible instantaneous velocity the an individual can attain) derived from each model. Time for a 2000m race was predicted statistically better using the two-parameter model (R2 = 0.948) than using the three-parameter model (R2 = 0.925), but the three-parameter model appeared more reasonable physiologically. Conclusion: The CV models are valid derived from the six predicting trials in this paper. It is necessary to include the 2000m predicting trial to describe accurately the relationship between velocity and time to fatigue in lightman rowing. From a physiological standpoint, the three-parameter models are superior to the two-parameter models in modelingmathematically and predicting the performance of 2000m race for rowing ergometry and the test trials used in the present study.