Deviation from goal pace, body temperature and body mass loss predictors of road race performance

Objectives: The purpose of this study was to examine the relationship between pacing, gastrointestinal temperature (TGI), and percent body mass loss (%BML) on relative race performance during a warm weather 11.3 km road race. Design: Observational study of a sample of active runners competing in the 2014 Falmouth Road Race. Methods: Participants ingested a TGI pill and donned a GPS enabled watch with heart rate monitoring capabilities prior to the start of the race. Percent off predicted pace (%OFF) was calculated for seven segments of the race. Separate linear regression analyses were used to assess the relationship between pace, TGI, and %BML on relative race performance. One-way ANOVA was used to analyse post race TGI (=40 °C vs 0.05). There was a trend in a slower pace (p = 0.055) and greater %OFF (p = 0.056) in runners finishing the race with a TGI > 40 °C. Conclusions: Overall, finish time was influenced by greater variations in pace during the first two miles of the race. In addition, runners who minimized fluid losses and had lower TGI were associated with meeting self-predicted goals