Public health advocates know our environment, filled with processed foods and sedentary lifestyles, is largely to blame for America's obesity epidemic. That's why there's a big push to make the healthy choice the easy choice. "We have a physiological drive for high-sugar, high-calorie foods," says Stephanie Rost, a registered dietician with the Weight Watchers 360 program. "These are the foods that we're surrounded by, in an environment where it's OK to eat wherever and whenever you like." Changing our environment, experts say, may be more effective than trying to control our natural impulses. Borrow a few ideas from Rost and Anytime Fitness chief scientific officer Brian Zehetner to revamp your space for weight loss success.