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Study aim: To assess the changes in serum lipid profile of volleyball players in various phases of competition period characterised by creatine kinase activity.Material and methods: A group of 14 Polish elite volleyball players aged 23 - 34 years were examined 3 times during the competition period lasting 10 weeks. Total cholesterol (TC), LDL, HDL, triacylglycerols (TG) and creatine kinase (CK) activity were determined in serum. Body fat content was determined from 4 skinfolds by Durnin's method.Results: Creatine kinase activity was very high throughout the study period although significantly decreased in relation to the first examination; TC, LDL, TC/HDL and LDL/HDL gradually increased while HDL decreased. Nevertheless, the values of TC, HDL, LDL and LDL/HDL were within normal limits in all subjects throughout the study.Conclusions: The changes in lipid profile may be regarded as transitory and of no significant impact on the risk of cardiovascular diseases as in all cases they were within physiological ranges.
Content available remote Effects of age, gender and physical activity on plasma lipid profile
Study aim: To assess the effects of gender, age and engagement in physical activities of elderly subjects on their plasma lipid profiles.Material and methods: Four groups of subjects, n = 11 each, participated in the study: young men (YM) and women (YW), aged 25 - 32 years, and sedentary, elderly men (EM) and women (EW), aged 58 - 66 years; additionally, a group of 7 women (AW), aged 60 - 65 years, who trained twice weekly (45-min sessions) for 8 months, was studied. The following concentrations of lipids in plasma were recorded: triacylglycerols (TG), total cholesterol (TC) and its fractions: HDLC and LDLC (computed), as well as the TC/HDLC ratio.Results: Lipid profiles were, generally, less favourable in elderly than in younger subjects, high HDLC values noted in active, elderly women being an exception. In elderly subjects, men's profiles were closer to those of younger subjects than in elderly women and differed significantly (p<0.001) lower for TC and LDLC compared with EW group. Triacylglycerols were within normal limits in all groups except EW; LDLC values were mostly abnormally high, the percentages of subjects having normal values ranging from 0 (YM and EW) to 27% (YW).Conclusions: The age-dependent worsening of lipid profiles increased the risk of cardiovascular diseases in sedentary elderly subjects. On the other hand, the beneficial effects of motor activities on lipid profile observed in elderly women evidence the indispensability recommending of physical exercises to the elderly.
Study aim: The purpose was to assess dietary intake of energy and selected nutrients and plasma lipid profile in young women and men with different levels of physical activity. Material and methods: The research included a total of 116 female and male students at the University of Physical Education who differed in their levels of physical activity. Analysis of the diets was based on 24-hour dietary interviews collected over 4 days prior to blood collection. Concentrations of total cholesterol (TC), HDL cholesterol (HDL-C), and triacylglycerol (TG) were measured in venous blood. In addition, the concentration of LDL cholesterol (LDL-C) and the ratios of TC / HDL-C and LDL-C/HDL-C were calculated. Results: Women, regardless of their physical activity levels, were characterized by a significantly higher concentration of total cholesterol in plasma (4.8 and 4.5 mmol/L, respectively - in training participants; 4.7 and 4.3 mmol/L, respectively - in non-training participants), although their dietary intake of cholesterol was significantly lower in comparison with the corresponding groups of men (282.0 and 484.7 mg, respectively - in training participants; 252.6 and 400.2 mg, respectively - in non-training participants). A trend toward a worse lipid profile of training women and men compared with the corresponding groups of non-training participants was also observed. Conclusions: Increased physical activity in the groups of training women and men was not a sufficient stimulus to induce positive changes in their lipid profiles. Nor can it be excluded that the observed differences were the result of diet, as dietary intake of cholesterol in the groups of training women and men was higher compared with the corresponding groups of non-training participants.
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