Hi doc, i regularly exercise for 1 hr atleast 3 days a week. over the last 3 days i have chest pain and it spreads to the left shoulder. pulse = 136.

Seek medical care: At your age, it is unlikely that your symptoms are related to your heart, but you should make sure by seeing a doctor. Your symptoms could also be related to area muscles/nerves and/or your esophagus/stomach. Even your lungs could be involved. In other words, such symptoms at your age are non-specific and need proper evaluation.