With the Edinburgh festivals under way, laugh yourself fit - Gillian Russell explores the physical and mental benefits of laughter.

Neuroscientist and occasional stand-up comedian Prof Sophie Scott explains what is happening to both mind and body when we laugh and suggests that we should all be taking laughter a bit more seriously.

Laughter Yoga specialist Manda Stretch explains what laughter yoga is and how we can benefit both physically and mentally from it. Gillian (experienced giggler but novice yoga practitioner!) tries it out for herself.

Pauline Ginnelly describes how laughter yoga changed her life.

Comedian Vladimir McTavish talks about his passion for running, how he manages to fit it in around his gigs and whether he believes laughter and fitness go hand-in-hand. Show less