Abstract des Autors

Sixty healthy males, 21.0 +/- 1.1 years old, performed a graded submaximal exercise on a bicycle ergometer for 18 min in normoxic and acute hypoxic conditions. The exercises were carried out in a hypobaric chamber at pressures simulating the following altitudes a.s.l.: 2000, 2420, 3000, 3590 and 4100 m. The simulated altitudes of 2000, 2420 and 3000 m, which represent the complete physiologically compensated zone for lowlanders according to aviation medicine standards, seems to be too small a stimulus to produce significant biochemical changes in response to exercise, as compared to normobaric conditions. However, in conditions of lower (3590 m) and upper (4100 m) limit of hypoxia disorder zone for lowlanders, the responses to graded submaximal exercise (blood glucose, lactate and pyruvate) were significantly different than at sea level. Verf.-Referat