According to the World Obesity Atlas, 42% of the global population will be overweight or obese in 2025. Lack of physical activity is one of the primary causes. Experts regard this as a serious health problem and in Greco-Roman times, too, doctors thought being overweight was bad for one’s health.
The physician Rufus of Ephesus (active in the 1st and 2nd centuries AD) wrote a book called On the Slimming of Fat People. Fat people, he suggested:
