Researchers in Britain have concluded that people employed in that country's big cities, like London, are effectively working six days a week because of their long commutes.
They may be in the office or workplace for five days but daily commutes of an hour or more each way, every day adds up to the equivalent of another work day.
"People are spending a sixth working day getting back and forth to work," said researcher Alexi Marmot of building consultant AMA Associates in London.
"The individual sees it as a great loss," she told a scientific conference. Because it is not family or work time, it is effectively downtime, she said.
Marmot said he had analyzed data from a survey of several thousand office workers in more than 100 office buildings to assess working conditions and environment.