I am 68 years old and have always been in very good health - had an EKG and other tests run about 4 years ago and was told that my heart was in great shape - and that I had no plak.
However lately - if i am out in the heat working in the garden and I bend down or even squat for a period of time and get up - I almot black out - and feel very light headed for a while
I can work for long periods of time if I do not squat or bend down -
I have never smoked or drank -