Andrew J Renfree

Learn More
Successful participation in competitive endurance activities requires continual regulation of muscular work rate in order to maximise physiological performance capacities, meaning that individuals must make numerous decisions with regards to the muscular work rate selected at any point in time. Decisions relating to the setting of appropriate goals and the(More)
Numerous studies have demonstrated that induced alkalosis through ingestion of a sodium bicarbonate (NaHCO 3 ) solution can enhance performance during maximalintensity exercise of varying durations, as well as maintain performance during high-intensity intermittent exercise. Several studies have investigated the effect of dose ingested on subsequent(More)
PURPOSE The objective of this study is to examine risk taking and risk perception associations with perceived exertion, pacing, and performance in athletes. METHODS Two experiments were conducted in which risk perception was assessed using the domain-specific risk taking (DOSPERT) scale in 20 novice cyclists (experiment 1) and 32 experienced ultramarathon(More)
PURPOSE This study examined the determinants of pacing strategy and performance during self-paced maximal exercise. METHODS Eight well-trained cyclists completed two 20-km time trials. Power output, rating of perceived exertion (RPE), positive and negative affect, and iEMG activity of the active musculature were recorded every 0.5 km, confidence in(More)
The anticipatory RPE feedback model (Tucker 2009) proposes that during self paced exercise tasks, muscular work is continually regulated through comparison of a subconscious ‘template’ Rating of Perceived Exertion (RPE) that serves to protect against the development of catastrophic physiological failure, and a ‘conscious’ RPE that is generated through(More)
The collection of retrospective lap times from video footage is a potentially useful research tool to analyze the pacing strategies in any number of competitive events. The aim of this study was to validate a novel method of obtaining running split-time data from publically available video footage. Videos of the 1500-m men's final from the 2004 and 2008(More)
Browne, S. & Renfree, A. (2013). Exercise performance and neuromuscular activity at a fixed level of RPE following manipulation of peripheral physiological status. J. Hum. Sport Exerc., 8(3), pp.820-828. PURPOSE: to analyse the effect of manipulation of peripheral physiological status on performance and neuromuscular activity during cycling at a fixed level(More)
PURPOSE To analyze pacing strategies displayed by athletes achieving differing levels of performance during an elite-level marathon race. METHODS Competitors in the 2009 IAAF Women's Marathon Championship were split into groups 1, 2, 3, and 4 comprising the first, second, third, and fourth 25% of finishers, respectively. Final, intermediate, and(More)
As sports scientists, we claim to make a significant contribution to the body of knowledge that influences athletic practice and performance. Is this the reality? At the inaugural congress of the Australian Association for Exercise and Sports Science, a panel of well-credentialed academic experts with experience in the applied environment debated the(More)
PURPOSE Previous literature has presented pacing data of groups of competition finalists. The aim of this study was to analyze the pacing patterns displayed by medalists and nonmedalists in international competitive 400-m swimming and 1500-m running finals. METHODS Split times were collected from 48 swimming finalists (four 100-m laps) and 60 running(More)