A COMPARISON OF THE RESPIRATORY EXCHANGE OF MEN AND WOMEN AS AFFECTED BY THE INGESTION OF GALACTOSE

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Abstract
The respiratory exchange was measured with an open-circuit apparatus and helmet for 10 15-min. periods with men and women after 20 and 30 gm. of galactose. The av. maximum rise in the R.Q. with 4 men was 0.11 in the 3rd 1/4 hr., and 0.14 with the 5th subject (3 exps.) in the 4th 1/4 hr. with 20 gm. The 6 [female] subjects had the same av. rise as the 4 men, but a much greater variability individually. The av. max. rise after 30 gm. was 0.16 with 4 men in the 3rd and 4th 1/4 hrs. and 0.17 with women in the 4th 1/4 hr. Out of 5 women, 4 had a max. rise of 0.19 or over, thus greater than with any of the men. The av. increase in apparent combustion of carbohydrate after the ingestion of 20 gm. of galactose was 4 gm. with both sexes, but the variation with the [female][female], 1.4-6.3 gm., was greater than with the [male][male]. The av. increase with 30 gm. was 9.9 gm. with the [male][male] and 7.8 gm. with the [female][female]. The increased heat production after 20 gm. was 1.9 cal. with men and 5.4 cal. with women. After 30 gm., it rose 9.7 cal. with men and 5.7 cal. with women. The most marked differences in the 2 sexes were the tendency for the majority of the [female][female] to have higher max. rises in R.Q., greater initial increases in heat production after 20 gm., but greater increase in carbohydrate combustion and heat production with the [male][male] after 30 gm., and the generally wider deviations individually in all the factors with the women.

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