Influencia de la dieta y del ejercicio físico sobre las concentraciones plasmáticas de las diferentes fracciones lipoproteicas aisladas mediante ultracentrifugación.

Identificador:  PC:3298

Handle: https://hdl.handle.net/20.500.11797/PC3298

Autors:  SALAS SALVADÓ, JORGE; J Joven; L Masana; C Villabona; J Ansoleaga; A Escobar; R Solà

Resum:
Plasmatic levels of cholesterol and triglycerides in each lipoprotein fraction, ultracentrifugally isolated, as well as the plasma apoprotein A and B levels, were assessed in 13 healthy male body-builders. A dietary interview was performed in order to valorate the nutritional status of these subjects. The diet in body-builders was substantially different from that of the control group. The intake calories, proteins, total lipids and cholesterol was significantly higher; the intake of saturated fatty acids was significantly (p<0.001) higher (56.1 ± 19.6 g/day) than in the control group (30.7± 9.5 g/day) what made that the ratio P/S was about half (0.24 ± 0.11) of that o the control group (0.47 ± 0.14) with a p < 0.05. The diet and the physical activity determined a statistically significant (p < 0.05) increase in the plasma cholesterol of body-builders (195.4 ± 36.1 mg/dl; p < 0.001) respect to control group (163.7 ± 41.2 mg/dl). The high density lipoprotein cholesterol was also increased in the group of athletes (67.1 ± 13.4 mg/dl, versus 50.2 ± 9.5 mg/dl; p < 0.001). The other changes in the different lipoprotein families, except for HDL-triglycerides, did not reach statistical significance. The atherogenic effect of the diet rich in cholesterol and saturated fatty acids was overlapped by the protective effect of the physical exercise, at least respect to changes in lipoprotein composition. In any attempt to study the influence of one variable, the other must be borne in mind.