Because a known fact is better than an unknown fact.

There's a difference between over-training and over-exercising. Over-training can be you're trying to do something at high performance, but when you're over-exercising it just means that you don't have a life. And there are obviously people who go to that extreme.

I am not qualified to talk about the diet. Simply because I am not a dietician.

In my day, at 12 years old, which was 38 years ago, we worked out in summer months for two and a half hours. Today someone in that age group might work out for four hours, two hours in the morning and two at night

And if you have high cholesterol, you would feel the same as if you had low cholesterol because there are no side effects, no symptoms of having high cholesterol.

As a kid, chess was the first thing I studied in a structured way that helped me gain the discipline to study medicine and become successful doctor.

Past performance speaks a tremendous amount about one's ability and likelihood for success.