Abstract des Autors

For the evaluation of gas transport during exercise 38 runners were examined on the treadmill while performing a multi-stage test, an aerobic test and a maximum anaerobic test. Measured values were heart rate, VO2, VA, gas pressures, arterial and transcutaneous pO2 and pCO2 and lactate. The decrease of pO2 in the maximum anaerobic test (D-pO2 19.3 +/- 9.2) correlated well with the increase of lactate (r = 0.83) and with the anaerobic capacity (r = 0.81). Arterial pO2 during exercise decreased to an individual level. The ventilation at the aerobic threshold (AT) was higher with a better aerobic capacity of an athlete. Athletes, which are aerobically trained, had an increased sensitivity to hypoxemia (9.1 +/- 5.1 l/min/mmHg) compared with anaerobically trained athletes (4.5 +/- 1.0 l/min/mmHg). Verf.-Referat