Abstract

Data was collected from two men who attempted an 80 km run. Measurements of aerobic power (V02 max) and determinations of heart rate (HR) and submaximal oxygen consumption (V02) 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 V02 as a percentage of V02 max. One subject completed the 80 km distance at 58 of V02 max, the other subject, operating at 74 of V02 max, was obliged to retire after 55 km. The datain this and other studies indicate that the high energy costs reported for the marathon (70-85 of V02 max) cannot be sustained over the 80 km distance but that about 60 of V02 max can be continued for seven hours and longer. Verf.-Referat