Smashhdown!

Michael Mosley teams up with Olympic athletes to test which types of exercise give you the strongest bones. Geneticist Dr Giles Yeo investigates how to stay healthy if your body clock is out of sync with your work day. GP Dr Zoe Williams looks into which health advice on the internet you can trust. Surgeon Gabriel Weston carries out an experiment to discover if cleaning our homes with antibacterial products could be responsible for the rise in allergies and asthma.

Michael Mosley runs an experiment to test whether beetroot and leafy greens can give your body and brain a boost. GP Dr Zoe Williams investigates the new generation flu vaccine and gives advice on which health apps for your phone can be trusted. Surgeon Gabriel Weston discovers a new treatment that promises to improve the mobility of stroke survivors. Psychiatrist Dr Alain Gregoire reveals how to spot generalised anxiety disorder and what you can do about it.

Get ready for home runs because it's all about softball this episode! Our players are hitting, catching, sprinting and pitching, while Glen and the Dummy get schooled by some Queensland softball champions.