By Ian Thorpe, 5-time Olympic gold medallist for Australia …
We have a rule of thumb in swimming: for every month you have off it takes about three months of training to get back to your previous condition.
I’m not sure what the time frame is when you’ve been out of action for five years like me, but it can’t be too good!
Read more here on bbc.co.uk (now with video)
See altso this video on mirror.co.uk.