The loss of exposure to natural daylight can increase the chance of depression associated with Seasonal Affective Disorder (SAD).
This is according to the Seasonal Affective Disorder Association website, which found that around seven per cent of the population are troubled by SAD every winter between September and April.
Along with depression, sufferers can experience sleep problems, lethargy, over eating, a loss of concentration and mood changes.
Dr Lance Workman, senior lecturer in Psychology from Bath Spa University, urged employers to be flexible in order to prevent psychological problems becoming too much of an issue among employees.
He suggested offering more flexible working hours to allow people to get more time in natural light.
"In fact we do know the daylight is more important than the exercise, but put the two together for thirty minutes a day most days of the week and people that have a little bit of a mood problem in winter can [notice] a huge difference," added Dr Workman.
Independent advice on private healthcare