Is sweating good for body and soul? Gillian Russell spends a hot half hour in a sauna in Callander to find out everything you ever wanted to know about sweat... Dr Stuart Galloway from the Faculty of Health Sciences & Sport at Stirling University explains what sweat is, why we sweat and what's going on in our bodies when we sweat. Do antiperspirants work, how can we effectively replace fluids after sweating when we exercise and do men actually sweat more than women? Gillian tries out a hot yoga session at Heat Fitness in Stirling and asks instructors Jack and Jules about what the heat and sweat can do for us physically and mentally. Excessive sweating can be debilitating and embarrassing for some people. Dr Carol McAllister explains to Richard Forbes how botox can work to alleviate the symptoms. Elizabeth Pawley from Heart Song Healing describes what a sweat lodge is and how the heat and sweating can be beneficially for our mental health and wellbeing.