Do saunas actually boost your health?

January is usually the time when many of us decide to embrace a healthier lifestyle, whether it's cutting out the booze, joining the gym or even going for a sauna.  Saunas have become increasingly popular over the last yea,r with more people trying to make healthier choices, but do they actually boost your health?  Pat was joined by Dr Heather Massey, associate professor of extreme environments and physiology at the University of Portsmouth, to discuss.