I'd like to give another perspective. When someone says people should not start exercising before seeing a doctor and without supervision, they are saying: you

I'd like to give another perspective. When someone says people should not start exercising before seeing a doctor and without supervision, they are saying: you can die! And people can really die if they "go back to the roots" and start running pursuing animals. So, when someone says: don't this radical change in your nutrition habits, people should listen carefully.