Is Work Killing You? 03.08.2012 • By druckeradmin “Mass does not do work; brains and muscles do. In fact, overweight inhibits work, and gross overweight totally immobilizes.” — Peter F. Drucker, 1980 Image source: Online University, which notes that “over 80% of Americans work in jobs that require little to no physical activity, and the effects are starting to show.”