The majority of Americans are stressed, sleep-deprived, and overweight. As a result, they suffer from largely preventable lifestyle diseases such as heart disease, cancer, stroke, and diabetes. But the treatments for these conditions are simple, enjoyable, and often free—even if they do sometimes require you to go against the grain of common habit. Being overweight or obese is a problem for the 50 percent of adults who suffer high blood pressure, the 10 percent who suffer diabetes, and the 35 percent with pre-diabetes. Public and personal health care costs from these conditions are unaffordable and growing. About 90 percent of the nearly $4 trillion Americans spend annually for health care in the United States (which includes $1.5 in public money) is for chronic diseases and mental health conditions. But there are new lifestyle “medicines” that are free that doctors could be prescribing for all their patients. Lifestyle medicine is the clinical application of healthy behaviors to prevent, treat, and reverse …