New research of the Australian National University (ANU) found out that people who work more than 39 hours a week are putting their health at risk. “Long work hours erode a person’s mental and physical health, because it leaves less time to eat well and look after themselves properly,” Leed researcher Dr Dinh said.
The research used data from about 8,000 Australian adults as part of the Household, Income and Labour Dynamics in Australia (HILDA) Survey.

http://www.anu.edu.au/news/all-news/a-healthy-work-limit-is-39-hours-per-week