Will a Few Weeks off from Exercise Hurt Me?

The answer:

Earlier this year, Paul Williams of the Lawrence Berkeley National Laboratory in California published some surprising results about a phenomenon he called "asymmetric weight gain and loss," based on a group of 55,000 runners he has been following since 1991. Put simply, he found that you gain more weight when you stop exercising than you lose when you subsequently resume the identical exercise program.

"In other words," Dr. Williams says, "if you stop exercising you don't get to resume where you left off."

Looks like any excuses I've ever had for slacking off are even more worthless than usual.