They commissioned a survey of 2,000 UK adults where participants were asked to choose up to 3 activities which they believe are the best to reduce stress, and the results came up with the following list in volume order of replies.
Having a Bath
Sport / fitness
Because walking was perceived as the most beneficial pursuit for the relief of stress I have been asked to write and comment.
I reckon on Conrad Walks I am preaching to the converted as far as walking is concerned, but it is interesting to know how beneficial it may be over and above other strategies for people with mental health problems. The charity MIND has a wealth of information majoring much on ECOTHERAPY
ECOTHERAPY as administered by MIND provides a wide range of assistance based on the outdoor activities to help with mental health problems, and that would be a useful starting point for anybody looking for help, or anybody wishing to support another in that situation.
From my own observations a lack of a particular goal may be a contributory factor to some mental health problems, and whilst walking in itself may be helpful it may be further enhanced by looking at the various tick-lists of hills, some of which would be relatively easy to embark on: the English Marilyns, The Wainwrights, The County Tops etc. See:
If you know of others who may be looking for advice with mental health it may be helpful to pass on a link to this post.