There's a balance and I feel very, very strong and very, very fit at the moment. There's no - touch wood - niggles at the moment, there's nothing that's twinging or nothing that's too painful. Apart from a bit of chafing from the wetsuit!

I've always been a decent runner so I've never been massively unfit, but for this I've got stronger. I've got rid of a bit of podge and I'm just a bit leaner, which means that I'm just quicker at moving, I'm more agile and I recover much better as well. At the moment I feel ultra-fit and it's been an amazing change.

There's going to be a lot of eating. My listeners have tweeted me and said "You've just got to keep eating, keep your energy up and have someone on duty to give you a massage if you need it." It will be a case of getting it done and making sure I don't get too cold, because that's crucial for the muscles. So that's all going to be taken care of. But really there's not much you can do - if you start cramping up you've just got to get on with it.

What's most troubling is the open water swim. It's windy, the waves are getting in your face and the water is a bit dirty. And there's silly things like you can't touch the bottom if you swallow a mouthful of water.

You wouldn't run a marathon the day before you run a marathon, you need to leave some sort of surprise for your body.

There's a balance and I feel very, very strong and very, very fit at the moment. There's no - touch wood - niggles at the moment, there's nothing that's twinging or nothing that's too painful. Apart from a bit of chafing from the wetsuit!

The transitions will be tough because of the nature of a triathlon, you have to get changed and dry off or whatever. But this is going to be even harder because I have to do all that, then speak on the radio, do an interview with local telly, do some press and some interviews.