Abstract
In male prisoners, 18 to 48 years old, the effects of posture were studied on the levels of serum cholesterol and serum lactic acid. The effect of posture is limited to the nonfilterable elements of the blood, such as the proteins, and therewith also to all protein-bound serum compounds. As for these compounds, higher levels are found when measurements are made with the subject standing than when he is seated, and again the values are higher in the sitting than in the recumbent position. The increase in the values when posture was changed from recumbent to standing was 8 per cent. Exertion and meals affect the cholesterol levels less than does a change in posture. The lactic acid level is not dependent on posture but rises with slight exertion.
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