Drop in O2 sat: You don't mention what your oxygen saturation was (? by finger oximeter) before, during and at the end of exercise.I assume you achieved your goal of 85% of maximal heart rate, had no symptoms of signs of myocardial ischemia. If your oxygen saturation dropped below 90%, and especially if you were short of breath I would be concerned about pulmonary disease.and would consult a pulmonologist
Answered 10/25/2020
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