Women need 7 hours a week

A recent study of middle-aged women shows they need at least an hour a day of exercise to maintain healthy their weight.  http://www.reuters.com/article/idUSTRE62M4YP20100323?loomia_ow=t0:s0:a49:g43:r1:c0.182692:b32161016:z0
True, enough, it seems to me.  And, to maintain an ideal weight, exercise just isn't enough.  One of my friends thinks of herself as a Prius.  Her body doesn't need  much fuel, and certainly not as much as the men in her life.
OK just for today, I'm going to really think about how much fuel I need before I put in my mouth even if it is a yummy cupcake that I want.  I don't need it today.  I'll have one after my half marathon if I really want it.  --kate readio