Conversation: The conversation between human and AI assistant.
[|Human|] when I run, or any vigorous up and down movement, it feels like something is bouncing up and down in my lower left chest, and Im forced to cough. earlier, my heart was pounding for a few seconds, but it died away. Im trying to start doing P90x, but I cant, due to the coughing. I am in excellent physical shape, but have no insurance
[|AI|]  Hello, Welcome to Chat Doctor. I can certainly understand your concern. I have worked through your query in detail. Rapid heart rate and cough can be a reflex mechanism operated in the due course of running. This is due to activation of the pulmonary and arterial pressure receptors within the lungs and heart. This reflex operates to increase the blood flow to heart and lungs during running to aid in increased metabolic demand on the body. These mechanisms will reverse once you come down to rest. These are not harmful, and you need not worry about it. Please check with your physician if he shares my view. Post your further queries if any. Thank you