Dr. John Scharffenberg, a very active centenarian, shares his 7 rules for a long healthy life.

It’s not a surprise that exercise is one of his 7 since it has a wide range of profound benefits.

What is surprising is that a nutrition professor believes it is more powerful than diet.

““Even though I’m a nutritionist, I think exercise is even more important than nutrition,” Scharffenberg says. It doesn't have to be running a marathon, he adds.

Scharffenberg points to a study that found people who walked more than 2 miles a day had only half the death rate of those who walked shorter distances.”

His others 6 were (not using tabacco, don’t drink alcohol, maintain a healthy weight, eat less meat, eat less sugar, eat less saturated fat).