Mae West once said, "Too much of a good thing can be wonderful." And we agree—at least when it comes to travel. But no one wants to return from a dream vacation with extra baggage around the middle, the result of endless lazing on the beach and grazing on the all-you-can-eat buffet.

So how do you avoid sloth and gluttony, two of travel's deadliest sins? Read on for nine easy, active ways to have a virtuous vacation—and even lose a bit of weight while away.

Note: Calories burned during each 30-minute activity are based on a 155-pound person; data is from Harvard University. Check with your doctor before participating in any physical activity.