What scary warnings? This is basic exercise science. It applies regardless if your VO2max is 88 or 30, and indeed John Doe is more at risk of hypoglycemia as hi

What scary warnings? This is basic exercise science. It applies regardless if your VO2max is 88 or 30, and indeed John Doe is more at risk of hypoglycemia as higher utilization of fatty acid oxidation at lower exercise intensity is one of the primary adaptations gained through training.