Hello,
I am 28 years old, 5'10", and about 175lbs. I am in reasonably good shape (exercise semi-regularly) but have found that I have recently been experiencing tightness in the chest and an elevated heart rate. These symptoms do not seem to be related to exercise, but instead appear to coincide with times of high humidity. I do not have a history of asthma (that I know of), nor have I ever been diagnosed with any irregularities of the heart. Any help would be greatly appreciated. (P.S. these symptoms have only started since I recently moved cities to a much higher humidity location. The air quality ratings (smog) are actually better here, but my chest feels worse!)