Myles W S
Br J Sports Med. 1979 Apr;13(1):12-4. doi: 10.1136/bjsm.13.1.12.
Data was collected from two men who attempted an 80 km run. Measurements of aerobic power (VO2 max) and determinations of heart rate (HR) and submaximal oxygen consumption (VO2) during treadmill running were carried out one week before the run. Throughout the 80 km run, HR was recorded by telemetry and used together with the laboratory data to estimate VO2 as a percentage of VO2 max. One subject completed the 80 km distance at 58% of VO2 max, the other subject, operating at 74% of VO2 max, was obliged to retired after 55 km. The data in this and other studies indicate that the high energy costs reported for the marathon (70-85% of VO2 max) cannot be sustained over the 80 km distance but that about 60% of VO2 max can be continued for seven hours and longer.
数据收集自两名尝试进行80公里跑步的男性。在跑步前一周，对他们进行了有氧能力（最大摄氧量，VO2 max）测量以及跑步机跑步期间心率（HR）和次最大摄氧量（VO2）的测定。在整个80公里跑步过程中，通过遥测记录心率，并将其与实验室数据一起用于估计VO2占VO2 max的百分比。一名受试者以VO2 max的58%完成了80公里的距离，另一名受试者以VO2 max的74%运行，在55公里后被迫退出。这项研究以及其他研究的数据表明，马拉松所报道的高能量消耗（VO2 max的70 - 85%）在80公里的距离上无法持续，但大约VO2 max的60%可以持续七个小时及更长时间。
