Thread: what burns more calories??
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Old 02-21-08 | 04:16 PM
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feethanddooth
this one's optimistic...
 
Joined: Apr 2006
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From: central new jersey

Bikes: cannondale r400 2006 kona smoke 2005 scott cr1 team

what burns more calories??
riding a bike 30 minutes at 17mph. or jackhammering a street for 30 minutes?
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