The British government has drawn up workplace exercise guidelines to tackle the rising levels of obesity in the country.
Office workers who want to lose weight should stand up while talking on the phone and walk over to speak to colleagues rather than emailing them, according to the official advice.
The guidelines issued by the Department of Health recommend that desk-bound staff carry out 'office work-outs' to increase activity, fight obesity and improve health.
It suggests taking the stairs rather than waiting for the lift and cycling or walking to work.
Staff are also advised to stand up every 30 to 40 minutes when talking on the phone to break up the amount of time they spend sitting down.
"Every 30 to 40 minutes, stand up while taking that phone call.
Don't send the email, walk over and speak to your colleague," the Daily Mail quoted Professor Fiona Bull, from the School of Sport, Exercise and Health Sciences at Loughborough University, as saying.
The guidelines also urge workers to try to break up the amount of time they spend sitting at a desk or in front of a computer.
Professor Fiona Bull, who helped draw up the guidelines, said there was growing evidence that long periods spent sitting down could lead to health problems.