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Old 06-23-10 | 07:55 AM
  #61  
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merlinextraligh
pan y agua
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Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike

Originally Posted by QuickityJacks
Make sure you use "general" cycling, not any of the speed specific selections when you're tracking rides. It averages out to the reasonably respected 40/cal mile formula
40 calories a mile would appear to be a gross generalization. Depends so much on the terrain, the speed, the rider's aerodynamics, pack or solo, etc.

15 mph, flat ground is not going to hit 40 calories. 20mph in a pack, flat ground is likely still under 40 calories.

25mph TT effort is likely above 40 calories a mile.

Climbing 10% grade is clearly above 40 calories a mile, descending well below that.

YCMV
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