More than half of U.S. workers eat lunch at their desks, if at all, because they feel pressured to get more done. But productivity doesn't work that way, an Australian trade union president said.

Taking a break can boost energy and actually helps workers be more productive. Managers should set an example and encourage employees to eat lunch away from their desks and computers.

Eating at your desk has other, more personal, drawbacks. It can mean you eat less nutritious foods and get less physical activity -- and you know what that can lead to.

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