The secret is not exercising like a madman.
Or starving yourself with a gimmicky diet.
The secret is simply understanding this basic set of facts:
So the secret to becoming a life-long fat burner instead of a fat storer is to live like your ancestors (as much as feasible) within the framework of this modern world.
No you don't have to live in a cabin high up in the Rockies away from all modern conveniences (although time in nature and especially in the forest is health promoting).
For example, a family history of heart disease or obesity will indeed predispose you to these conditions, but familial health problems that repeat over generations are highly influenced by a pattern of poor dietary and lifestyle habits. Altering the environmental signals that you send your genes can render familial predispositions to health problems or excess body fat storage virtually irrelevant.
While you are most certainly stuck with your eye and hair color from birth, nearly all the gene expression that influences health and longevity can be manipulated and optimized through your lifestyle behaviors.
Turn on "good" gene switches and you build muscle, increase fat burning, knock out an invading virus, or neutralize the oxidative damage to your cells that characterizes the process of aging and decline.
While you have a complex makeup of genes that is entirely unique, it's important to understand that genes have no effect until they are expressed.
Mark aka The Old Spartan and Over-50 Fitness Savior is a 61 year old coffee guzzling father of five wandering the outdoors around Albuquerque, New Mexico. Mark helps Men Over 50 get lean, healthy and strong so they can be cool dads and grand dads using his signature Spartan Method system.