[Klompy]

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I doubt I could go much faster then 15 minute miles without breaking into a jog.

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This is complete bs unless you're a midget or something. I've been running a mile with a group of people for a while, and I often have to run back to encourage the people who are still finishing their mile. For a lot of the people I can walk next to them at a semi brisk pace without really pushing myself and they still finish with a 12 minute mile or so (they're still "running" at their normal pace)

I think it's actually a pretty good bet assuming you're not going to be redic nitty about if he lifts his foot once or something. A 10 minute mile is super slow, but power walking is pretty slow for normal people too.

edit: you've replied and proven that you can go faster then 15.