Why Chest Pains During Exercise Occur. People develop chest pains during exercise because the heart receives signals from the brain to do more work. This means the heart beats harder to pump more blood to fuel the body.. The body doesn't get the fuel and oxygen it needs, and discomfort ensues.
Angina may feel like pressure in the chest, jaw or arm. It frequently may occur with exercise or stress. Some people with angina also report feeling lightheaded, overly tired, short of breath or nauseated. As the heart pumps harder to keep up with what you are doing, it needs more oxygen-rich blood.
It's a frightening sensation to feel your chest tightening during exercise. You might feel as if you can't breathe properly, or you might feel pain in your windpipe or .