The Effect of a High-Intensity Interval Training Program on High-Density Lipoprotein Cholesterol in Young Men
This study examined the impact of an 8-week program of high-intensity interval training on high-density lipoprotein cholesterol (HDL-C), total cholesterol (TC), and the atherogenic index (TC/HDL-C) in 36 untrained men ages 21-36 years. Participants were randomly assigned to an interval training group (n = 20) or a control group (n = 16). Participants in the experimental group performed 3.2 km of interval running (1:1 work:rest ratio) 3 times a week for 8 weeks at an intensity of 90% of maximal heart rate ( approximately 423 kcal per session). Results indicated significant pre- to posttraining changes in HDL-C (1.1 vs. 1.3 mmolxL, p < 0.0001) and TC/HDL-C (3.8 vs. 3.1, p < 0.0001) but no significant changes in TC (3.9 vs. 3.8 mmolxL, p > 0.05) with interval training. It was concluded that an 8-week program of high-intensity interval training is effective in eliciting favorable changes in HDL-C and TC/HDL-C but not TC in young adult men with normal TC levels. Our findings support the recommendations of high-intensity interval training as an alternative mode of exercise to improve blood lipid profiles for individuals with acceptable physical fitness levels.
Available from: Shin-Hae Lee
- "The level of HDL-C was reported to increase by exercise training (Kodama et al. 2007; Musa et al. 2009), but the effect of exercise training on the level of total cholesterol is controversial (Durstine et al. 2001; Fahlman et al. 2002). In our experiments, both of the total cholesterol and HDL-C levels were increased through exercise training (Figure 2). "
Animal cells and systems the official publication of the Zoological Society of Korea 02/2014; 18(1):34-40. · 0.44 Impact Factor
PM&R 02/2010; 2(2):151-5; discussion 155. DOI:10.1016/j.pmrj.2010.02.001 · 1.53 Impact Factor
Available from: Ronaldo Vagner Thomatieli Dos Santos
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ABSTRACT: This study examined the effects of acute supramaximal exercise (approximately 115% VO(2max)) on the blood lipid profile for three different carbohydrate (CHO) storage levels (control, low and high).
Six male subjects were randomly divided into three different groups: control, low CHO and high CHO. These groups differed in the diet to which the subjects were submitted before each exercise session. The lipid profile [triglycerides (TG), very low-density lipoprotein (VLDL), high-density lipoprotein (HDL)-cholesterol, low-density lipoprotein (LDL)-cholesterol, TG/HDL-C ratio and total cholesterol) was determined at rest, immediately after exercise and 1 h after exercise bouts.
The time to exhaustion was lower in the low CHO condition compared with the control and high CHO condition (3.59 +/- 0.72; 2.91 +/- 0.56; and 4.26 +/- 0.69 min; P < 0.05). The energy expenditure (control: 251.1 +/- 56.0 kJ; low CHO: 215.2 +/- 28.6 kJ; and high CHO: 310.4 +/- 64.9 kJ) was significantly different between the low and high CHO conditions (P < 0.05). There were no significant changes in the lipid profile for any of the experimental conditions (control, low and high; P < 0.05). Glucose and insulin levels did not show time-dependent changes in any of the conditions (P > 0.05).
These results indicate that a supramaximal exercise session has no significant effects on lipid metabolism.
European Journal of Clinical Investigation 08/2010; 40(8):759-65. DOI:10.1111/j.1365-2362.2010.02316.x · 2.73 Impact Factor
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