Horray! I am a huge fan of Dr Rangan Chattergee (he of the TV programme "Doctor in the House".
He's recently been speaking a lot about "lifestyle medicine" and the fact that doctors could be doing more to help their patients by teaching them to effect changes in their healthy by making changes to their lifestyle (diet and exercise). This can brign about improvements in mood, pain, etc.
It seems that it just might be happening! Hoping it's ok to post a YouTube video link here....