> What I got out of every medical organisation in the world then is "You're fine. Don't worry about it."

This is alien to me, because for at least 50 years now, heart disease and diabetes has been at the forefront of basically every developed country’s health problems, for which the only solution proposed by all health authorities has been to eat less and healthier, and to do cardiovascular exercise almost every day. Even from elementary school, I remember being taught in gym or health class that being active and exercising was necessary for long term health.