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Association between vitamin E and enhanced athletic performance in sled dogs
R J Piercy1, K W Hinchcliff, P S Morley
1Department of Veterinary Clinical Sciences and Human Nutrition, The Ohio State University, Columbus, OH 43210-1089, USA.
Medicine and Science in Sports and Exercise
|April 27, 2001
Summary
Higher plasma vitamin E concentrations in sled dogs are linked to enhanced endurance during long-distance races like the Iditarod. However, this vitamin status did not impact overall team speed.
Area of Science:
- Veterinary Medicine
- Animal Physiology
- Nutritional Science
Background:
- Sled dogs undergo extreme physical exertion during endurance races.
- Optimizing canine performance and health in these events is crucial.
- Plasma vitamin E concentration is a key indicator of antioxidant status.
Purpose of the Study:
- To investigate the relationship between prerace plasma vitamin E levels and sled dog performance in the 1998 Iditarod Race.
- To assess the impact of vitamin E on endurance and withdrawal risk.
- To determine if vitamin E influences team speed.
Main Methods:
- Collected prerace blood samples from 670 sled dogs.
- Analyzed plasma vitamin E concentrations, controlling for other variables.
- Utilized logistic regression and Cox proportional hazards analysis to evaluate endurance and withdrawal factors.
- Employed multiple linear regression to assess factors related to team speed.
Main Results:
- Dogs with higher prerace vitamin E (> 40.7 microg/mL) were 1.9 times more likely to finish the race.
- Elevated vitamin E levels reduced the risk of withdrawal by 1.8 times per mile run.
- No association was found between team vitamin E status and team speed.
Conclusions:
- Higher plasma vitamin E concentrations are associated with improved endurance in sled dogs.
- Vitamin E status appears critical for sustained performance and reducing withdrawal risk in endurance events.
- Team-level vitamin E status does not correlate with overall team speed.