What is one of the effects of increasing physical activity on cholesterol levels?

Increasing physical activity generally leads to a decrease in total cholesterol levels, which is why this choice is correct. Regular exercise has been shown to have a beneficial impact on lipid profiles by promoting weight loss, improving insulin sensitivity, and enhancing the body's ability to metabolize fats.

When physical activity is incorporated into a routine, it typically helps to lower low-density lipoprotein (LDL) cholesterol, often referred to as "bad" cholesterol, and can simultaneously raise high-density lipoprotein (HDL) cholesterol or "good" cholesterol. Collectively, these changes contribute to a healthier overall cholesterol profile, leading to decreased total cholesterol levels in many individuals.

The other provided choices do not align with the established outcomes of increased physical activity. Increased LDL cholesterol and decreased HDL cholesterol would typically indicate a worsening of one's lipid profile, which counteracts the desired effects of regular exercise. Additionally, having no change in cholesterol levels is less common in active individuals, as research consistently shows a positive influence of physical activity on cholesterol levels.