The best exercise is walking somewhere you can't get back from without even more walking. The corner of Silver Leaf Drive and Green Meadow Drive is six-tenths of a mile from my office; up and back makes 1.2 miles, a 20- or 25-minute stroll. It's uphill yet not steep on the way and pleasantly downhill back. It's far enough for me to lose my desk-job stiffness by the middle and be striding expansively by the end.
Hypothesis #1, lightly held and hopefully offered: Any day I eat 3 moderate meals and don't do any late night eating to cancel out all that lovely moderation, I will lose a pound or so.
Hypothesis #2, "yif that I can": Any day I eat 3 moderate meals and also walk to Silver Leaf and Green Meadow, I will do even better.