期刊名称：Journal of the International Society of Sports Nutrition
电子版ISSN：1550-2783
出版年度：2007
卷号：4
期号：1
页码：15
DOI：10.1186/1550-2783-4-15
语种：English
出版社：BioMed Central
摘要：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.
关键词：Respiratory Exchange Ratio ; Sweat Rate ; Submaximal Workload ; Record Attempt ; Cumulative Energy Intake
