چکیده:
<em>Introduction:</em> Clinical studies indicated that small dense LDL (sdLDL) levels are more powerful than LDL levels for the determination of severe stable coronary heart disease (CHD). The effects of intensive aerobic exercise on sdLDL levels are not well known; thus the aim of present study was to investigate effect of a strenuous aerobic exercise on sdLDL concentration in healthy men.<br /> <em>Material & Methods: </em>Elevenhealthy young men (aged: 20.8 ± 1.8 years; ± SD) volunteered to participate in this study. All the subjects were performed Repeated High-Intensity Endurance Test (RHIET) as a strenuous aerobic exercise. Blood samples were taken at baseline and immediately after the RHIET. Wilcoxon and paired-sample t-test was used to analyze the data.<br /> <em>Results:</em> The results showed that sdLDL (38.8 ± 11.3 mg/dl <em>vs.</em> 39.9 ± 11.3 mg/dl), TC (188.6 ± 36.2 mg/dl<em> vs.</em> 194.1 ± 42.2 mg/dl), TG (139.6 mg/dl ± 55.0 <em>vs.</em> 157.7 ± 79.7 mg/dl), LDL (109.1 ± 33.4 mg/dl<em> vs.</em> 121.5 ± 53.0 mg/dl) and HDL (44.0 ± 13.6 mg/dl<em> vs.</em> 44.6 ± 14.0 mg/dl) remained unchanged in response to strenuous aerobic exercise. Significant correlation was observed between changes of sdLDL with TC (r = 0.74, P = 0.008), TG (r = 0.65, P = 0.02) and LDL (r = 0.64, P = 0.03) levels.<br /> <em>Conclusions: </em>The results suggest strenuous aerobic exercise had not significant effect on blood lipids and lipoprotein subfractions.
خلاصه ماشینی:
Conclusions: The results suggest strenuous aerobic exercise had not significant effect on blood lipids and lipoprotein subfractions.
Discussion The primary aim of this study was to investigate the effect of a strenuous aerobic exercise on sdLDL concentration in healthy men.
(2016) also reported that an acute bout of moderate intensity exercise can increase sdLDL oxidation potential, independently of age and regardless of a change in selective LDL lipid components in healthy men (13).
(2016) also reported that an acute bout of moderate intensity exercise can increase sdLDL oxidation potential, independently of age and regardless of a change in selective LDL lipid components in healthy men (13).
The results showed that TC, TG, LDL and HDL remained unchanged in response to strenuous aerobic exercise, thus it seems that the lack of effect of strenuous aerobic exercise on sdLDL in the present study might be due to the absence of reductions in blood lipids especially TG levels.
(2012) in line with the results of present study indicated that lipid profile (TC, TG, LDL, LDL3, LDL4, vLDL, HDL, HDL2a and HDL2b) had no significant changes after a session of aerobic exercise on a treadmill with 70% VO2max in obese and overweight adults (24).
Hojjati and Shahsavari (2015) however indicated that serum TG and TC increased immediately after a single bout of aerobic exercise in type II diabetic females, however for LDL and HDL no significant changes were observed (25).
5. Conclusion The results suggest strenuous aerobic exercise had not significant effect on blood lipids and lipoprotein subfractions in healthy young men.