Many workers are putting their health at risk by overworking with the help of smartphones and tablets.

That’s according to the Chartered Society of Physiotherapy which claims that people are being turned into “screen slaves” by putting in extra work hours on their commute to and from the office.

The society said that poor posture in such environments could lead to back and neck pain while unions said people should learn to switch off their devices.

Chairwoman of the society said: “While doing a bit of extra work at home may seem like a good short-term fix, if it becomes a regular part of your evening routine then it can lead to problems such as back and neck pain, as well as stress-related illness.

The survey of 2,010 office workers found that almost two-thirds of those questioned continued working outside their regular office hours.

People were found to be topping up their working day with over two hours of extra screen time, on average, every day.