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Because I ran distances from 5k to marathon (with 10k being my favourite) and so I know from my own experience. I have no knowledge of how you run a 1000k run.

• TomK32 5y ago
  Ah, 5k running. I was still on topic with cycling. Sorry.
  • lmilcin 5y ago
    Oh, then we mistunderstood each other. Though I should have noticed, it is not possible to run 1000k in a day. Maybe you could, but you would need to have flat terrain and maybe something like a... bike:)