I go for a run every morning. (Because I sleep in and have to run out the door to the car. lol)
 
I've allways weighed between 140-150 pounds and have been very lean my entire life.  This year when I turned 43, I got an instant belly.  I mean, just at that moment in time I went from 150 to 160.  Not all that much, but it seemed instantanious.
I better do something before this gets out of hand.
 
I hope you feel better soon.
