Peveler, W., & Green, M. (2008). The effect of extrinsic factors on indoor 20k time-trial performance. ACSM 55th Annual Meeting Indianapolis, Presentation Number, 949.

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This study determined if the knowledge of competitors' prior performance times and racing next to a chase or lead opponent influences performance during a simulated 20k cycling time-trial. Male cyclists (N = 8) performed four 20k indoor simulated (Computertrainer) time-trials. During the base/familiarization trial, Ss time-trialed as fast as possible. Ss were then ranked fastest to slowest. Before the start of trial 2, Ss were shown the times and rank order from the first trial and were encouraged to move up in rank. After the second trial, Ss were ranked again and paired with the closest competitor. Two Computrainers were arranged side by side (both easily read by both competitors). Ss were alternately positioned to lead and chase in trials 3 and 4 in a counter-balanced manner. Means for time, mean power, ratings of perceived exertion, and heart rate were recorded and compared.

There were no significant differences for heart rates or ratings of perceived exertion among trials. The second time-trial was significantly faster than the first and also mean power was significantly greater. Time for the chase condition was significantly faster than the first trial. There were no significant differences found between leading, chasing, and the second trial for any dependent measure.

Implication. The extrinsic factors of chasing or being chased did not appear to impact overall performance in cycling. Performance on a second trial improved when knowledge of the first trial (extrinsic information) was provided.

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