Also, while it's promising that this doesn't increase heart rate or blood pressure, weight is just one factor in overall health. True, but it's a very telling

Also, while it's promising that this doesn't increase heart rate or blood pressure, weight is just one factor in overall health. True, but it's a very telling factor. Past a certain upper threshold, weight will have adverse impacts on a person's health, eg joint issues at a minimum. It's fairly easy and logical to look at a skinnier person (above a certain lower bound) and predict they will have fewer medical issues than a fat person. Of course, this is judging by certain proportions, hence why the BMI was invented (and before anyone goes off on the inaccuracy of BMI, just realize that unless body fat percentage is below a certain threshold (eg high-level athletes), BMI is a fairly accurate predictor of health).