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CLINICAL TRIAL
JOURNAL ARTICLE
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Maximal oxygen uptake during field running does not exceed that measured during treadmill exercise.
European Journal of Applied Physiology 2003 January
Modern ergometric equipment enables the simulation of laboratory maximal oxygen uptake (.VO(2max)) testing in the field. Therefore, it was investigated whether the improved event specificity on the track might lead to higher .VO(2max) measurements in running. Identical protocols were used on the treadmill and on the track (speed was indicated by a computer-driven flashing light system). Ambulatory measurements of gas exchange were carried out throughout both tests, which were executed in randomized order. There were no significant differences ( P=0.71) in .VO(2max) between treadmill [4.65 (0.51) ml.min(-1)] and field tests [4.63 (0.55) ml.min(-1)]. However, the test duration differed significantly ( P<0.001) by approximately 5%: treadmill 691 (39) s; field test 727 (42) s. With the exception of maximum heart rate (HR(max); significantly higher in the field with P=0.02) all criteria for the degree of effort were similar between the two tests. However, the difference in HR(max) at less than 2 beats.min(-1), was practically negligible. Submaximal measurements of oxygen uptake and minute ventilation were significantly higher on the treadmill ( P<0.001 for both parameters). In summary, field tests with incremental running protocols do not result in higher .VO(2max) measurements compared to laboratory treadmill exercise. A better running economy on the track results in higher maximal velocities and longer exercise durations being sustained. The determination of .VO(2max) is not a reasonable application for ambulatory gas exchange measurements because laboratory values are not surpassed.
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