A study published in the Annals of Behavioral Medicine found that participants who made one small, potentially permanent change in their food choices and/or physical activity each week (such as drinking one fewer can of soda or walking 5 more minutes each day) lost more than twice as much belly fat, 2½ more inches off their waistlines, and about 4 times more weight during a 4-month program, compared with those who followed traditional calorie-restriction and physical-activity guidelines.