The thing they were looking at was
When you reach a certain effort level called AT or anaerobic threshold your blood glucose will triple
that is what you can hold for just under one hour , and after that you "hit the wall" when body sugars get burned up,
Way helpful for runners to keep from going too fast,,,, Owner of the device does not think there is a fitness market for them
Yes excrsizing helps keep glucose lower and more stable, and lost weight is a huge help