Limit It

Guardian UK: Exercise is good for you – unless it's part of your job - Scientists find physically demanding jobs are linked to greater risk of early death

“If you go out for a run for half an hour in your leisure time,” he said, “that increases your heart rate and you feel well afterwards, but when you are physically active at work, it’s a very different type of activity. You are working for eight hours a day and have limited rest periods. You are lifting, doing repetitive movements, and manual handling.

“Our hypothesis is that these kinds of activities actually strain your cardiovascular system rather than help you to improve the fitness of your cardiovascular system.”