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Augmenting performance feedback does not affect 4 km cycling time-trials in the heat.
Mark Waldron1, Vincent Villerius, Aron Murphy
1a Exercise and Sports Sciences, School of Science & Technology , University of New England , Armidale , Australia.
Journal of Sports Sciences
|November 15, 2014
Summary
Augmented performance feedback did not improve cycling performance in the heat. Even with deceptive feedback, cyclists
Area of Science:
- Exercise Physiology
- Sports Science
- Environmental Physiology
Background:
- Augmented performance feedback, where feedback is manipulated to appear better than actual performance, is theorized to enhance motivation and subsequent performance.
- However, the efficacy of augmented feedback in extreme environmental conditions, such as heat, remains less understood.
- The physiological strain of exercising in heat may influence the perception and utilization of performance feedback.
Purpose of the Study:
- To investigate the impact of accurate versus surreptitiously augmented performance feedback on power output and physiological responses during a 4000 m time-trial in a hot environment.
- To determine if augmented feedback can overcome potential physiological limitations imposed by heat stress.
- To explore the relationship between physiological strain and the effectiveness of performance feedback.
Main Methods:
- Nine trained cyclists completed a baseline 4000 m time-trial in 30°C heat.
- Subsequently, participants underwent two further time-trials under identical conditions, receiving either accurate (ACC) or deceptively augmented (DEC; 2% increase) feedback.
- Total power output (PO), aerobic (Paer) and anaerobic (Pan) contributions, and rectal (Trec) and skin (Tskin) temperatures were measured.
Main Results:
- No significant differences in total power output (PO), aerobic (Paer), or anaerobic (Pan) contributions were observed between baseline, ACC, and DEC conditions (P > 0.05).
- Rectal (Trec) and skin (Tskin) temperatures increased significantly (P < 0.05) during the time-trials, indicating physiological strain.
- Typical pacing profiles were maintained across all conditions, with no interaction between feedback type and time-trial stage (P > 0.05).
Conclusions:
- Surreptitiously augmented performance feedback did not enhance power output or alter physiological responses in well-trained cyclists during a 4000 m time-trial in the heat.
- The potential motivational benefits of augmented feedback appear to be nullified by the physiological strain of exercising in a hot environment.
- Heat stress may lead to a central down-regulation of exercise intensity, overriding the effects of augmented performance feedback.
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