Source: Annual Congress 2002 - Assessment of lung function, telemonitoring and quality of life

Abstract

Although runners routinely train on treadmills (TRT), a sport-specific ergometric test for mountaineers has not yet been established. Ten healthy male subjects experienced in both long distance running and mountaineering underwent two different treadmill tests (Jaeger Laufergotest): The first test profile included an increase by 2 km/h after each 3 min. (TRT at a constant grade of 5% and an initial speed of 6 km/h), and a second test with a progressive treadmill grade increase by 5% after each 3 min. (starting with 0% at constant 5 km/h) (uphill walking test, UWT). Heart rate (HR), blood lactate (BL) and ventilation (Jaeger Ergo-Oxyscreen) were assessed in both tests under each load, at the end of the test, and 3 min. postexercise. The highest running speed in both tests was 16.1 ±] 1.1 km/h, and the max. treadmill grade was 33.4 ±] 3.7%. While the HR did not differ between the tests, BL at submaximal work load (80%) was higher (p <0.05) and the anaerobic threshold (4 mmol/L) lower in the UWT (68.5% vs.77.6% of work load max.). The VO2max was higher by a third (4.8 vs. 3.6 L/min), ventilation (MVV) and oxygen consumption (p<0.001) at max. work load were notably higher in UWT. Higher VO2 and BL in UWT suggest a lower mechanical efficiency in UWT at submaximal work loads. It is suggested that the VO2max in the TRT mode may be leveled off by an earlier mechanical limitation of breathing amplitude. The UWT may allow a higher VO2max and MVV and therefore may be recommended as the sport-specific ergometric device for mountaineers.

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W. Domej, G. Schwaberger, P. Hofmann, Z. Földes-Papp, U. Demel, G. P. Tilz (Graz, Austria). Ergometric investigation: treadmill running versus uphill walking in mountaineers. Eur Respir J 2002; 20: Suppl. 38, 987

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