According to the American Heart Association, sedentary jobs, such as computer work, have risen 83 percent since 1950. Jobs requiring physical activity currently make up less than 20% of the United States workforce, down from 50% in 1960.
Women have gained almost three inches on their waistlines since the 90s telegraph.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from telegraph.co.uk Daily Mail and Mail on Sunday newspapers.
HEALTH NOTES: High doses of drugs used by millions to treat skin conditions such as eczema significantly increase the risk of the bone-thinning disease osteoporosis.