Final answer:
The best rationale for encouraging daily walking in clients diagnosed with CAD is that exercise promotes the development of collateral circulation. This can improve cardiovascular health by reducing LDL cholesterol, blood pressure, and the rate of atherosclerosis progression.
Step-by-step explanation:
The nurse is discussing the importance of exercising with a client who is diagnosed with CAD. Among the potential benefits of regular exercise such as walking for 30 minutes a day, a. Exercise promotes the development of collateral circulation is the most accurate rationale. This is because regular physical activity improves cardiovascular health in various ways, including promoting the development of new pathways for blood to travel around blocked arteries or collateral circulation. Regular exercise is also known to lower bad cholesterol levels (LDL), reduce blood pressure, and slow down the rate of atherosclerosis plaque formation.
While it is clear that exercise cannot directly remove plaque that has already formed in the arteries, the reduction in new plaque formation, improvement in cholesterol levels, and lowering of blood pressure significantly decrease the complications associated with atherosclerosis. Furthermore, engaging in regular exercise enhances overall fitness, which may lead to healthier individuals, even if they are overweight, as compared to those who are sedentary and slender.