Institute of Health and Biomedical Innovation, Queensland University of Technology, Australia.
J Int Soc Sports Nutr. 2007 Oct 31;4:15. doi: 10.1186/1550-2783-4-15.
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.
本研究考察了一位超长耐力运动员在尝试打破最长时间固定自行车骑行记录期间自我调节饮食的能力。该尝试要求运动员以至少 20 公里/小时的速度骑行，每八小时允许休息 15 分钟。实验室测试确定了心率-耗氧量回归方程，可根据尝试期间的心率计算能量消耗。能量摄入通过在摄入时收集的非称重饮食记录确定。运动员以 24 +/- 1.6 公里/小时的速度完成了 46.7 小时，骑行距离为 1126 公里。他消耗了 14486 卡路里，摄入了 11098 卡路里，导致能量不足（-3290 卡路里）和体重减轻（-0.55 公斤）。碳水化合物（42 +/- 32 克/小时）、水（422 +/- 441 毫升/小时）和钠（306 +/- 465 毫克/小时）的摄入量均低于当前建议。运动员无法自我调节饮食或运动强度，以防止能量负平衡。
