Final answer:
Physical inactivity is considered a modifiable risk factor for coronary heart disease because it's associated with increased mortality and various health issues. Regular physical activity can mitigate these risks by improving multiple health markers, including cholesterol levels, blood pressure, and weight.
Step-by-step explanation:
Physical inactivity is considered to be a modifiable risk factor for coronary heart disease. This is due to the various ways in which physical exercise positively impacts cardiovascular health. Engaging in regular physical activity has been proven to reduce several risk factors, including hypertension (high blood pressure), high levels of "bad" cholesterol (low-density lipoproteins), and excess body weight, while also boosting "good" cholesterol (high-density lipoproteins) and insulin sensitivity. Furthermore, exercise enhances the mechanical efficiency of the heart and exercise tolerance, permitting individuals to perform physical activities without undue stress and fatigue.
However, physical inactivity can lead to an increase in cardiovascular disease mortality. Modifiable risk factors like physical inactivity, along with an unhealthy diet, smoking, and excessive alcohol consumption, are factors that can be controlled by adopting healthful behaviors. These behaviors can help in the prevention and management of cardiovascular disease, which has risk factors tied to both environmental and genetic factors.