Abstract

Aim of the study was to examine the influence of acute prolonged exercise on plasma lipids, lipoproteins, apolipoproteins, and lecithin cholesterol acyltransferase (LCAT) activity. Results: 1) TG, total cholesterol, and LDL-Chol in plasma decreased significantly during 4 days training camp, in particular, plasma TG concentration (30-40 decrease) in both male and female athletes. 2) Female athletes showed significantly higher resting level of HDL-Chol (77 mg/dl) than male (51 mg/dl) before training camp, and no significant change due to physical training was observed. Male athletes showed significant increases in resting plasma level of HDL-Chol on the 3rd day (56.4 mg/dl) and on the 4th day (58.1 mg/dl) of the training camp. 3) Resting levels of apo A-I, C-III, and E and apo A-I/A-II ratio were significantly higher in women than in men, but apo B was significantly higher in men than in women. It seemed that the higher resting levels of these apolipoproteins before camp, the more decreased during the camp. 4) The ratio of apo C-II/C-III considered to be a control factor of lipoprotein lipase (LPL) activity showed a gradual and significant increase during the camp in male athletes. 5) A significant decrease in LCAT activity was observed in both men (-27) and women (-15) on the 3rd day of the training camp, this decrease persisted for the next day. It is suggested that these exercise-induced modifications are possibly mediated in part by the change in LPL-dependent lipolysis, as reflected by the high apo C-II/C-III ratio. Verf.-Ref.