Investigations on comparative 0² pulse values measured in car driving and in equivalent work on bicycle ergometer.

The 0² pulse measured while driving a car in motorway, town, up-hill and down-hill courses and while performing such work on bicycle ergometer in the laboratory as to require an 0² consumption identical with that measured in the driving tests. 0² consumption was measured with the open circuit technique and heart rate with continuous e.c.g. recording. For equal 0² consumptions the 0² pulse resulted always lower in driving tests than in the equivalent tests on bicycle ergometer due to the higher heart rate during driving than on bicycle ergometer. The higher value of heart rate is interpreted as the consequence of higher brain structure pulse deriving from emotional factors.