title: The influence of pacing during 6-minute supra-maximal cycle ergometer performance.
abstract: The aim of this study was to evaluate the influence of pacing on performance, oxygen uptake (VO2), oxygen deficit and blood lactate accumulation during a 6-minute cycle ergometer test. Six recreational cyclists completed three 6-minute cycling tests using fast-start, even-pacing and slow-fast pacing conditions. Cycle ergometer performance was measured as the mean power output produced for each cycling test. Energy system contribution during each cycling trial was estimated using a modified accumulated oxygen deficit (AOD) method. Blood lactate concentration was analysed from blood sampled using a catheter in a forearm vein prior to exercise, at 2 minutes, 4 minutes and 6 minutes during exercise, and at 2 minutes, 5 minutes and 10 minutes post-exercise. There was no significant difference between the pacing conditions for mean power output (P = 0.09), peak VO2 (P = 0.92), total VO2 (P = 0.76), AOD (P = 0.91), the time-course of VO2 (P = 0.22) or blood lactate accumulation (P= 0.07). There was, however, a significant difference between the three pacing conditions in the oxygen deficit measured over time (P = 0.02). These changes in the time-course of oxygen deficit during cycling trials did not, however, significantly affect the mean power output produced by each pacing condition.
authors.affiliation: School of Health Sciences, Deakin University, Burwood, Victoria, Australia.
authors.forename: B
authors.initials: B
authors.lastname: Aisbett
authors.forename: P
authors.initials: P
authors.lastname: Le Rossignol
authors.forename: W A
authors.initials: WA
authors.lastname: Sparrow
mesh_terms: D000328:Adult; D015308:Anaerobic Threshold / Q000502:physiology; D000704:Analysis of Variance; D001642:Bicycling / Q000502:physiology*; D004734:Energy Metabolism / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D016014:Linear Models; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology
chemical_list: D019344:Lactic Acid