Answer:
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No, it's because we need to breathe. Your body needs oxygen. Air pressure has little to nothing to do with it as far as I know.
Answer:
During exercise, increases in cardiac stroke volume and heart rate raise cardiac output, which coupled with a transient increase in systemic vascular resistance, elevate mean arterial blood pressure (60). However, long-term exercise can promote a net reduction in blood pressure at rest.
Explanation: