Augmenting performance feedback does not affect 4 km cycling time-trials in the heat.
We compared the effects of (1) accurate and (2) surreptitiously augmented performance feedback on power output and physiological responses to a 4000 m time-trial in the heat. Nine cyclists completed a baseline (BaseL) 4000 m time-trial in ambient temperatures of 30°C, followed by two further 4000 m time-trials at the same temperature, randomly assigning the participants to an accurate (ACC; accurate feedback of baseline) or deceived (DEC; 2% increase above baseline) feedback group. The total power output (PO) and aerobic (Paer) and anaerobic (Pan) contributions were determined at 0.4 km stages during the time-trials, alongside measurements of rectal (Trec) and skin (Tskin) temperatures. There were no differences (P > 0.05) in any of the variables between BaseL, ACC and DEC, despite increases (P < 0.05) in Trec and Tskin. Typical pacing profiles were demonstrated; however, there was no interaction (P > 0.05) between feedback condition and time-trial stage. Providing surreptitiously augmented performance feedback to well-trained cyclists did not alter their performance or physiological responses to a 4000 m time-trial in a hot environment. The assumed influence of augmented performance feedback was nullified in the heat, perhaps reflecting a central down-regulation of exercise intensity in response to an increased body temperature.
a Exercise and Sports Sciences, School of Science & Technology , University of New England , Armidale , Australia.
Mark
M
Waldron
Vincent
V
Villerius
Aron
A
Murphy
D000328:Adult; D054874:Athletic Performance / Q000502:physiology / Q000523:psychology*; D001642:Bicycling / Q000502:physiology / Q000523:psychology*; D001676:Biofeedback, Psychology / Q000379:methods*; D001833:Body Temperature Regulation / Q000502:physiology; D008192:Deception; D006358:Hot Temperature; D006801:Humans; D008297:Male; D009042:Motivation; D010465:Perception / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology
deception; fatigue; pacing; thermoregulation