This study examined the capabilities of an ultraendurance athlete to self-regulate their diet during an attempt on the record for the longest period of stationary cycling. The attempt required the athlete to complete at least 20 km/hr, with a 15 minute break allowed every eight hours. Laboratory tests determined a heart rate-oxygen consumption regression equation enabling calculation of energy expenditure from heart rate during the attempt. Energy intake was determined by a non-weighed dietary record collected at the time of consumption. The athlete completed 46.7 hours, covering 1126 km, at a speed of 24 ± 1.6 km/hr. He expended 14486 kcal and consumed 11098 kcal resulting in an energy deficit (-3290 kcal) and a weight loss (-0.55 kg). The carbohydrate (42 ± 32 g/hr), water (422 ± 441 ml/ hr), and sodium (306 ± 465 mg/hr) intake were all below current recommendations. The athlete was unable to self-regulate his diet or exercise intensity to prevent a negative energy balance. © 2007 Stewart and Stewart; licensee BioMed Central Ltd.
CITATION STYLE
Stewart, I. B., & Stewart, K. L. (2007). Energy balance during two days of continuous stationary cycling. Journal of the International Society of Sports Nutrition, 4. https://doi.org/10.1186/1550-2783-4-15
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