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- Heart Disease
I've been feeling light-headed every now and then for the past few months. I'm 38, weigh 95 kg, and am 5'7". I don't smoke or drink, and I've been avoiding sugar and cholesterol. My thyroid level is 5.8. I recently started jogging two months ago, and my ECG says I have sinus bradycardia. Should I be worried about this? Is it related to my new exercise routine or something else?