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Difference in Pacing Between Time- and Distance-Based Time Trials in Trained Cyclists.

Chris R Abbiss, Kevin G Thompson, Marcin Lipski

International Journal of Sports Physiology and Performance

|February 13, 2016

Summary

Cyclists started distance-based time trials at higher power outputs than similar duration-based trials. This difference may stem from how athletes perceive exercise endpoints in time versus distance challenges.

Keywords:

cycling feedback pacing strategy starting strategy

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Area of Science:

Exercise Physiology
Sports Science
Human Performance

Background:

Pacing strategies are crucial for optimizing performance in endurance cycling.
Understanding differences in pacing between distance and duration goals is essential for training and competition.

Purpose of the Study:

To compare pacing profiles in self-paced cycling time trials between distance-based and duration-based conditions.
To analyze differences in average power output, power output decline, and ratings of perceived exertion (RPE) between trial types.

Main Methods:

Thirteen trained cyclists completed four self-paced time trials: 4-km and 20-km (distance-based), and 6-min and 30-min (duration-based).
Participants aimed for maximal average power output in all trials.
Ratings of Perceived Exertion (RPE) were recorded throughout each trial.

Main Results:

No significant differences in average power output were found between 4-km and 6-min trials, or between 20-km and 30-min trials.
Distance-based trials (4-km and 20-km) were initiated with higher power outputs compared to their time-based counterparts (6-min and 30-min).
The rate of power output decline was steeper in the 20-km trial than the 30-min trial, with higher RPE in the 4-km versus 6-min trial.

Conclusions:

Trained cyclists adopt different pacing strategies when aiming for a set distance versus a set time.
Distance-based time trials tend to elicit higher initial power outputs, potentially due to clearer endpoint perception.
These findings highlight the importance of considering the type of time trial (distance vs. duration) when analyzing pacing strategies and performance in cycling.