I recently completed a 10m tough mudder from a position of being mildly out of shape. What worked for me was the usual tactic of building up slowly, running small amounts and going for longer runs every time. Usually did it around twice a week and after around 3 months I was in decent enough shape for at least the running parts.
It’s amazing how quickly you adapt and your body conditions itself for longer runs. In fact after only a couple of runs I was going from 3m to around 5 or 6 which I thought pretty cool (still killed me, though, lol).
So yeah. Slow and steady, go at your own pace. It’s a ‘race’ but you’re only competing against yourself in reality, so have fun with it.
It’s amazing how quickly you adapt and your body conditions itself for longer runs. In fact after only a couple of runs I was going from 3m to around 5 or 6 which I thought pretty cool (still killed me, though, lol).
So yeah. Slow and steady, go at your own pace. It’s a ‘race’ but you’re only competing against yourself in reality, so have fun with it.