FITNESS, FATNESS, AND POST-EXERCISE KETOSIS
1971; Elsevier BV; Volume: 297; Issue: 7699 Linguagem: Inglês
10.1016/s0140-6736(71)91164-0
ISSN1474-547X
AutoresRalph H. Johnson, J.L. Walton,
Tópico(s)Muscle metabolism and nutrition
ResumoThe fitness index assessed by the Harvard step test and body fat (expressed as a percentage of body-weight) were determined in twenty-one young men. Total blood-ketone levels after a half-hour run were measured at the end of the run and 1 hour and 2 hours later. Plasma-free-fatty-acids (F.F.A.) were also measured at these times. The leaner subjects tended to have higher fitness indices, but there was a better correlation between fitness index and degree of post-exercise ketosis (the less fit men developing a greater degree of ketosis) and also between fitness and the F.F.A. levels 1 hour after exercise. The relationship between body fat and post-exercise ketosis was not significant. It would, therefore, seem that ketone-body production after exercise is more closely related to the indivi-dual's fitness than to his degree of obesity.
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