While some companies have started giving employees new incentives to stay healthy, others are penalizing those who practice unhealthy lifestyles.
Wal-Mart, for example, will start charging higher insurance premiums next year for workers who smoke.
The retail giant said it will continue to offer free classes for those who want to quit smoking.
Other companies are upping premiums for things like obesity and high cholesterol as well.
According to Reuters, many employers tried encouraging workers to improve their health voluntarily by introducing programs and classes, but not enough people were signing up and showing results.
Critics say the higher premiums could hurt low income workers who may not be as healthy as others because they cannot afford gyms or health foods.