I am a 65 yr old male with good to excellent blood pressure, am 6'1" and just under 200#s. Lately I have been having dizziness and near blackouts when I do heavy physical exertion, such as carrying 30+ pounds 100' or so, scooping/shoveling snow, carrying buckets of feed to my chickens/pigs, etc. Heart disease runs in my family, but my checkups so far have been good.