Final answer:
Regular exercise is the hobby linked with decreasing the risk of IHD by improving cardiovascular health, reducing cholesterol levels, slowing plaque formation, and lowering blood pressure.
Step-by-step explanation:
The hobby specifically linked with Ischemic Heart Disease (IHD) is regular exercise. This activity promotes cardiovascular health and can reduce the risk of developing conditions associated with IHD, such as high blood pressure and atherosclerosis.
Physical activity is beneficial because it enhances the efficiency of the heart, allowing for a larger stroke volume at a lower heart rate, which reduces stress on the heart. Additionally, through exercise, overall cholesterol levels are lowered, notably low-density lipoproteins (LDLs) that are associated with increased risk of cardiovascular disease. Exercise also slows the formation of atherosclerotic plaque and reduces blood pressure, supporting the health of the arterial walls and minimizing the heart's workload.