[Normal indicators of spiroergometry in young persons]

The stepwise bicycle ergometric test was conducted in 57 normal untrained individuals (30 females and 27 males) in order to estimate their maximum oxygen uptake. To make the results more reliable, individual variations in subjects' maximum working capacity should be considered. Cardiac stroke volume was shown to be different at the peak of exercise. The same stress capacity, shown in a heterogeneous sample, may be indicative of both normal and abnormal conditions, or signify different functional classes.