Spartan Race UK - Training Advice Wanted

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Hi

I am looking for some advice, there is a Spartan race in the UK in I would really like to take part. At present I am severly unfit & over weight sadly I have put 12lbs back on out of the the 36 I have lost so far, and i am struggling to get back in to it and thought if i had something to focus on would get me back on track!

Anyway the main question I want to ask if anyone has any advice on training for it, the race is the Sprint race any advice recieved would be greatly appreciated

Many Thanks :happy: