Donald M. Watkin, M.D., F.A.C.P.; John B. Das, M.B.; M. Constance McCarthy, B.S.
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In a series of studies designed to evaluate protein requirements during strenuous work performed daily for long periods of time, subjects receiving lower (0.4 g/kg/day) and higher (1.2 g/kg/day) levels of high quality protein and limited calories (35 cal/kg/day) were evaluated for cardiovascular performance before, during, and after work phases ranging from 20 to 44 days. Work equivalent to about 1,200 cal daily was performed by subjects' walking 1 hour twice daily on motor driven treadmills set at 4 mph and a 10% grade. Additional subjects consuming identical diets but performing no work served as absolute controls. Whereas all participants
Watkin DM, Das JB, McCarthy MC. Dietary Protein and Cardiovascular Performance.. Ann Intern Med. ;60:710. doi: 10.7326/0003-4819-60-4-710_2
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Published: Ann Intern Med. 1964;60(4):710.
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