[Differences in energy expenditure for selected activities under controlled and uncontrolled conditions].

Experiments with the Max-Planck respirometer were made to determine the energy expenditure. 4 kinds of comparable tests were made under standard conditions and ad libitum individual: walking on solid, level ground with light clothing, in high lace boots (walking-speed 5 km/h), walking with 10 kg resp. 20 kg load on level, solid ground (running speed 10 km). The energy expenditure under standard conditions is much higher than in the working-elements ad libitum speed and distance. Many persons overestimate their personal energy expenditure which is a reason for a positive energy balance succeeded by overweight.