Workers at over 100 companies experienced greater job satisfaction and slept better once they switched to a shorter work schedule with no pay cut, researchers found.

Working long hours week after week, with no end in sight, takes a toll on employees. Long work hours have been shown to significantly decrease mental and physical health and lead to less productivity at work.

Increases in perceived work ability — at both company and individual levels — indicate that the work reorganization process opened up by four-day weeks has led to profound