Elevated high-density lipoprotein cholesterol levels in older endurance athletes

Area of Science:

• Exercise Physiology
• Cardiovascular Health
• Lipid Metabolism

Background:

• Aging is associated with changes in plasma lipoprotein profiles.
• Endurance exercise may influence lipid metabolism and cardiovascular risk factors.
• Masters athletes represent a unique population for studying the long-term effects of exercise.

Purpose of the Study:

• To compare the plasma lipoprotein/lipid profiles of older endurance athletes (masters athletes) with sedentary men of similar age.
• To investigate the impact of age and endurance training on cardiovascular risk markers.

Main Methods:

• Cross-sectional study comparing five groups: masters athletes, older untrained-lean men, older untrained-not lean men, young athletes, and young untrained men.
• Measurements included maximal oxygen uptake, body fatness, and plasma lipid profiles (HDL, total cholesterol, LDL cholesterol).
• Statistical analysis (p < 0.05) was used to determine significant differences between groups.

Main Results:

• Masters athletes exhibited higher maximal oxygen uptake and lower body fatness than untrained men, irrespective of age.
• High-density lipoprotein (HDL) cholesterol was significantly higher in masters athletes compared to all other groups.
• Total cholesterol (TC) and low-density lipoprotein (LDL) cholesterol were generally higher in masters athletes than younger groups but lower than older, not-lean men.
• TC/HDL cholesterol ratios were significantly lower in masters athletes and young untrained men compared to older untrained men.

Conclusions:

• Masters athletes demonstrate a more favorable plasma lipoprotein profile, including higher HDL cholesterol and lower TC/HDL ratios, than their sedentary counterparts.
• Regular endurance exercise in older age may contribute to a reduced risk of coronary artery disease.
• These findings highlight the potential cardiovascular benefits of lifelong endurance training.