The normal response to exercise is an increase in heart rate. When weight training you should not exhale on the effort.
Ischemia is the lack or deficiency of oxygen-rich blood.
In the heart, this is usually due to constriction or partially occluded coronary arteries. Yes, it increases circulation, oxygen delivery to active muscles, and body temperature. It also reduces the risk of muscle and joint injury. The Healthy Heart Newsletter is a publication of the Healthy Heart Helpers Association.