R.lepehca – I would be interested to know What the terrain was likE before I would even consider a judgement about your fitness, off road, really stony, gravelly, hard packed canal tow path, new tarmac? It all makes a difference.
If you want to test your fitness do a bleep test. I have a bleep test MP3 I can send you.
You might have been dehydrated, or undernourished, there are a multitude of reasons why you might have had a hard time. Possibly you did the trail really really fast and actually just knackered yourself out.
Oh and Flow is hideous troll and pretty much everything he says is to try and wind you up.
From a recent thread
flow – Member ………. just winding these bunch of couch potato wannabe MTB’ers up.