* No diet on the planet will maintain a healthy weight if you don’t exercise. The trick is how much? Most health experts recommend that Americans exercise at least a half hour most days of the week, but people who have lost weight – and more importantly maintained the weight loss – are moving much more than that. They get lots of exercise; the equivalent of an hour or more a day or 28 miles of walking a week, which means they probably have much less time to veg out in front of the TV.  The more weight you have lost and need to maintain, the more you have to move. Researchers don’t understand why a formally obese person must exercise more than an always-lean person to maintain the lower weight, although they speculate it probably relates to some kind of permanent metabolic slowdown that results from having been obese. It’s not fair that you need to move 12,000 steps a day, while your skinny neighbor might need only 8,000 steps, but that’s the reality. To spice up their active lives, weight-loss maintainers turn to variety, with six out of every ten masters incorporating two or more types of exercise into their weekly routines.  Photo credit: Chris JL via Compfight