How many calories do you need to burn each day

As a friend of mine said "Do the Math"
Calories in have to at least equal Calories out.
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We can read all the books and watch all the videos.
You can buy every fancy promotion products and snap up every diet fad.
The weight loss industry is a 10 billion dollars event and saddled with more chuck wagon side show Bobs
than you can count. We are consumed with the quick and easy and this industry is one of the leading
soap opera's on how to lose "X" pounds in record time.
They fail to mention about those who gain is all back.
Well back to my friend.
This is a gentlemen who now runs marathons among other sporting activities.
Who used to be overweight and as a fire fighter was going to calls of heart attache victims who looked
just like him.
Reality struck as he realized they could be coming to his house someday so he made some simple changes.
It was in our conversation that he said "Calories in have to equal calories out"
So he made simple adjustments in his eating habits.
Adjustments he could live with and then more changes as his nutrition knowledge improved.
These adjustments have now become habits.
Habits make your life.