Poorly designed pseudo-scientific studies that draw dubious conclusions are bad for your health. Articles written in support of those dubious studies are bad for your  health and yes, long hours are bad for your health. Long hours are bad for you health, if you are always working long hours, if you are sacrificing your mental and physical fitness, your family, friends and your community outside of work, and if your long hours are unproductive. So in other words, long hours are bad for your health.