Regular aerobic training tends to improve lipid profiles by which of the following?

Regular aerobic training tends to improve lipid profiles by which of the following?

• A. It tends to raise LDL cholesterol and triglycerides.
• B. It has no effect on HDL.
• C. It tends to raise HDL cholesterol and lower triglycerides and LDL.
• D. It reduces total cholesterol.

Answer: (C)

Regular aerobic training shifts lipid metabolism toward a more favorable profile. It increases HDL cholesterol by boosting production of protective apolipoprotein A-I and enhancing reverse cholesterol transport, partly through improved HDL function and related enzyme activity. At the same time, it raises lipoprotein lipase activity in muscle, which helps break down triglyceride-rich particles (like VLDL and chylomicrons), lowering blood triglycerides. It also improves clearance of LDL and can shift LDL particles to a larger, less atherogenic form, contributing to lower LDL levels. Because total cholesterol can vary with many factors, the most consistent and informative change from regular aerobic exercise is higher HDL with lower triglycerides and LDL.