Thread: How long can you sustain riding at 90% HRM?
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Old 04-11-07 | 09:13 PM
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TheKillerPenguin
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Originally Posted by donrhummy
Is that a tested MHR? That's FAST!
Self tested. Body tingling and everything.

I am 21 though, so its about where it should be if you do the 220-age thing.
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