Saunas are popping up all over the country, with many people claiming they relax muscles and help ease stress. But what does the science say? This week, James Gallagher travels to Môr A Sawna in Jackson’s Bay, Barry, where he treats himself to a sauna session and undergoes a number of physical tests to find out what benefits the sweaty heat could offer.

Next up, James visits The Advanced Neuropathies Centre in Cardiff to speak with Professor Liam Gray, a surgeon who is leading a pioneering treatment for Huntington’s disease.

Presenter: James Gallagher

This episode was produced in partnership with The Open University.