Did another race yesterday, a half marathon over a very hilly course. The sun came out to play, which made it too hot to run, a couple of nice downhills made it fun.

If anyone is interested in seeing the route it's here - http://www.mapmyrun.com/run/united-k...24827987122228

Click on elevation and then stretch the box vertically.

I complete around 20 races a year, no marathons this year but I have completed 9 so far including New York, Paris & London.

The biggest problem is that runners tend to use a lot of air underwater, they are used to using a lot of air while running, my tip is just to think about your breathing for a minute as soon as you hit your depth - it works for me.