Which of the following is NOT an explanation for how exercise reduces risk of a fatal heart attack?

Question

Quizplus · Accepted Answer

Exercise does not reduce collateral circulation, which is the formation of additional blood vessels to bypass blocked arteries. The other options all provide valid explanations for how exercise reduces the risk of a fatal heart attack. Increased elasticity of arteries allows for better blood flow and less strain on the heart. Less atherosclerosis means there is less build-up of plaque in the arteries, reducing the risk of blockages. Reduced fibrin, which is a protein involved in blood clotting, means that blood is less likely to form clots that can block blood vessels and cause a heart attack.

Which of the Following Is NOT an Explanation for How