My guest today is x2 World champion and London 2012 Gold Medallist David Smith MBE.David was awarded an MBE for his services to rowing in 2013.You may also recognise David from his impressive career in cycling, where he has also represented Great Britain.David has been through some incredibly difficult hardships, including having to fight for his life due to a rare tumour and suffering a spinal cord injury.This is one of the most phenomenal conversations on how you can push both your mental and physical boundaries and never take life for granted. As well as what it takes to be a world champion.