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!

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.

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.

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

'm starting to get a swimming physique, which I'm very pleased about, because for me that's the most appealing male physique. It's not show-y off-y Mr Muscle, "Look how much I can bench." It's just a real lean, athletic figure and it doesn't look like you try too hard. When you see people who have huge biceps, it looks like they're in the gym all day. But I think there's a difference between looking muscly and being fit.

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.

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!