I believe there is increased strain on your heart if you are overweight due to body fat. However I am overweight due to my muscle mass. Since I started training my BMI has gone from the middle of normal to overweight.
I know the BMI should be ignored for adults with high muscle to fat percentage, but I still am overweight, I weigh 81kgs and I am 5ft 11".
Since muscle needs a lot of blood, is there still extra strain damaging my heart? And if not, why not?