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Committee on Diet and Health, Food and Nutrition Board. Washington, D.C.: National Academy Press.

1989b Recommended Dietary Allowances, 10th ed. Report of the Subcommittee on the Tenth Edition of the RDAs, Food and Nutrition Board, Commission on Life Sciences . Washington, D.C.: National Academy Press.

Strauss, M.B., E. Lamdin, W.P. Smith, and D.J. Bleifer 1958 Surfeit and deficit of sodium. Arch. Int. Med. 102:527–536.


Taylor, H.L., A. Henschel, O. Mickelsen, and A. Keys 1944 The effect of sodium chloride intake on the work performance of man during exposure to dry heat and experimental heat exhaustion. Am. J. Physiol. 140:439–451.

Tobian, L. 1989 The relationship of salt to hypertension. Am. J. Clin. Nutr. 32:2739–2748.


Wyndham, C.H., A.J.A. Benade, C.G. Williams, N.B. Strydom, A. Golden, and A.J.A. Heynes 1968 Changes in central circulation and body fluid spaces during acclimatization to heat. J. Appl. Physiol. 25:586–593.


Zar, J.H. 1974 Biostatistical Analysis. Englewood Cliffs, New Jersey: Prentice Hall.

Discussion

DR. NESHEIM: Questions for Dr. Armstrong?

PARTICIPANT: I wasn't sure how to read that one slide. Are you showing, then, on the 8-gram diet, a higher body weight? Is that what this shows?

DR. ARMSTRONG: You saw a decrease in body weight at the midpoint.

PARTICIPANT: So you were showing that—explain that slide again.

DR. ARMSTRONG: On the 8-gram diet yes, there was, on the average an increase in body weight.

PARTICIPANT: So the people on the moderate salt diet had a higher body weight.

DR. ARMSTRONG: Not statistically significant.

PARTICIPANT: But you could argue, since the tonicity was the same, that they may have had a slightly increased extracellular food volume.

DR. ARMSTRONG: Yes.

PARTICIPANT: What happened in the urine tests? You showed urine sodium. What happened to urine potassium?

DR. ARMSTRONG: There were two spikes that were significantly different. I am only looking at the a.m. value, however, and that may have been due to drinking fruit juice, for example, the night before or to some other source of potassium. Captain Moore can probably speak more to the 24



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