Agree - and I see the difference between a pace group in a marathon and a pacer in an IM.

I know rabbits are used in running races - I'm drawing a blank on specific examples. I remember watching some marathons on TV that would have pacers for the first half, then a different group for the second half.

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maybe she's born with it, maybe it's chlorine
If you're injured and need some sympathy, PM me and I'm very happy to write back.
disclaimer: PhD not MD