Abstract
Exercise economy is one of the main physiological factors determining performance in endurance sports. Running economy (RE) can be improved with running-specific training, while the improvement of cycling economy (CE) with cycling-specific training is controversial. We investigated whether exercise economy reflects sport-specific skills/adaptations or is determined by overall physiological factors. We compared RE and CE in 10 runners, 9 cyclists and 9 triathletes for running at 12km/h and cycling at 200W. Gross rates of oxygen consumption and carbon dioxide production were collected and used to calculate gross metabolic rate in watts for both running and cycling. Runners had better RE than cyclists (917 ± 107W vs. 1111 ± 159W) (p < 0.01). Triathletes had intermediate RE values (1004 ± 98W) not different from runners or cyclists. CE was not different (p = 0.20) between the three groups (runners: 945 ± 60W; cyclists: 982 ± 44W; triathletes: 979 ± 54W). RE can be enhanced with running-specific training, but CE is independent of cycling-specific training.
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