Institut Nacional d'Educació Física de Catalunya, Sports Sciences Research Group, Universitat de Barcelona, Spain.
J Int Soc Sports Nutr. 2012 Feb 6;9(1):3. doi: 10.1186/1550-2783-9-3.
Information about behavior of energy intake in ultra-endurance cyclists during a 24-hour team relay race is scarce. The nutritional strategy during such an event is an important factor which athletes should plan carefully before the race. The purpose of this study was to examine and compare the nutritional intake of ultra-endurance cyclists during a 24-hour team relay race with the current nutritional guidelines for endurance events. Additionally, we analyzed the relationship among the nutritional and performance variables.
Using a observational design, nutritional intake of eight males (mean ± SD: 36.7 ± 4.7 years; 71.6 ± 4.9 kg; 174.6 ± 7.3 cm; BMI 23.5 ± 0.5 kg/m2) participating in a 24-hour team relay cycling race was assessed. All food and fluid intake by athletes were weighed and recorded. Additionally, distance and speed performed by each rider were also recorded. Furthermore, before to the race, all subjects carried out an incremental exercise test to determine two heart rate-VO2 regression equations which were used to estimate the energy expenditure.
The mean ingestion of macronutrients during the event was 943 ± 245 g (13.1 ± 4.0 g/kg) of carbohydrates, 174 ± 146 g (2.4 ± 1.9 g/kg) of proteins and 107 ± 56 g (1.5 ± 0.7 g/kg) of lipids, respectively. This amount of nutrients reported an average nutrient intake of 22.8 ± 8.9 MJ which were significantly lower compared with energy expenditure 42.9 ± 6.8 MJ (P = 0.012). Average fluid consumption corresponded to 10497 ± 2654 mL. Mean caffeine ingestion was 142 ± 76 mg. Additionally, there was no relationship between the main nutritional variables (i.e. energy intake, carbohydrates, proteins, fluids and caffeine ingestion) and the main performance variables (i.e. distance and speed).
A 24-hour hours cycling competition in a team relay format elicited high energy demands which were not compensated by energy intake of the athletes despite that dietary consumption of macronutrients did not differ to the nutritional guidelines for longer events.
关于超长耐力自行车运动员在 24 小时团队接力赛中能量摄入行为的信息很少。在这样的比赛中，营养策略是运动员在比赛前应仔细计划的重要因素。本研究的目的是检查和比较超长耐力自行车运动员在 24 小时团队接力赛中的营养摄入与耐力比赛的当前营养指南。此外，我们分析了营养和表现变量之间的关系。
使用观察设计，评估了 8 名男性（平均 ± SD：36.7 ± 4.7 岁；71.6 ± 4.9 公斤；174.6 ± 7.3 厘米；BMI 23.5 ± 0.5 kg/m2）参加 24 小时团队接力自行车比赛时的营养摄入情况。运动员摄入的所有食物和液体均称重并记录。此外，还记录了每位骑手的距离和速度。此外，在比赛前，所有受试者都进行了递增运动测试，以确定两个心率-VO2 回归方程，用于估计能量消耗。
比赛期间，宏量营养素的平均摄入量为 943 ± 245 g（13.1 ± 4.0 g/kg）碳水化合物、174 ± 146 g（2.4 ± 1.9 g/kg）蛋白质和 107 ± 56 g（1.5 ± 0.7 g/kg）脂质。这些营养素的摄入量报告了平均 22.8 ± 8.9 MJ 的营养素摄入量，与 42.9 ± 6.8 MJ 的能量消耗相比明显较低（P = 0.012）。平均液体摄入量相当于 10497 ± 2654 mL。平均咖啡因摄入量为 142 ± 76 mg。此外，主要营养变量（即能量摄入、碳水化合物、蛋白质、液体和咖啡因摄入）与主要表现变量（即距离和速度）之间没有关系。
24 小时团队接力赛需要很高的能量，尽管运动员的宏量营养素饮食消耗与较长时间的比赛的营养指南没有差异，但运动员的能量摄入并未得到补偿。
