4. This sort of goes along with question #1. This is optional but listing what you eat throughout a normal day would be cool to see.
Breakfast: I usually try to have something light but filling. Yeah, not much fits that description. I'm always hungry by lunch because I don't eat much for breakfast. I can never eat much for breakfast as I'm almost never hungry when I wake up. A typical breakfast of mine would be two slices of toast (minus the crust; I hate crust) with cream cheese and/or grape jelly and a glass of orange juice on the side. I LOVE ORANGE JUICE.
Lunch: Whatever they serve at school. If I don't get hot lunch at school, I'll just bring a sandwich from home. On weekends, I... don't think I usually eat lunch. I know I didn't eat lunch today. I wasn't hungry.
1. Crust is actually the most essential part of bread as it helps to build stronger teeth.
2. Never skip a meal. Sorry for being your fairy godmother lately.
Being healthy really isn't a matter of how much exercise you have or what type of diet. I've never paid any consideration to health having probably a below average rating for all categories you've mentioned. But I can run faster than most and make 35 push ups before I need to stop for breath. I consider myself healthy.
I agree to an extent. It also depends on one's body composition. Some people are built to endure more than others.
Cultural legacy also comes into place. In Malcolm Gladwell's Outliers, the author brilliantly presents this case with the town of Roseto in Pennsylvania where people ate fatty foods and smoked regularly and yet had significantly smaller rates for heart disease than the rest of the nation. And it wasn't race either. Others from the original Italian village from which these immigrants had emigrated from did not show such exceptional health. It was the air of community and close relationships that kept cheeks rosy and the heart beating. Health is more complex than most believe.