My big mouth has landed me with a challenge I really didn't think through very well. But I'm stubborn and won't back down now. So, I accidently suggested to a couple of friends we should take part in a mini tough mudder event this May. It's a 5 mile slog through a load of muddy obstacles with a team to help each other make it to the finish. They caught me off guard and agreed to sign up, whoops. Those of you who've met me will know I'm pretty unfit and eat way too much. So now I've got until May to get myself into a shape less like a potato so I don't let them down. Any top tips?