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MyMarathonCoach

Wednesday, April 8, 2009

Simple Science

Heart Rate

Approximate maximum HR = 220 - age
Approximate training zone target: lower limit = 0.6 x max HR, upper limit = 0.8 x max HR

Bike Fit

Frame size (cm, center-to-center) = inseam (cm) x 0.65
Saddle height (cm, from center of bottom bracket to top of saddle) = inseam (cm) x 0.883

Inseam - Crankarm Length

inseam of less than 74 cm = 165 mm crankarm
inseam of 74 to 80 cm = 170 mm crankarm
inseam of 81 to 86 cm = 172.5 mm crankarm
inseam of 87 to 93 cm = 175 mm crankarm

(Crankarm is measured from the center of the bottom bracket axle to the center of the pedal mounting hole.)

Length Conversions:
to get centimeters: multiply inches by 2.54
centimeters to inches: x 0.394

to get meters: multiply feet by 0.305, or yards by 0.914
meters to feet: x 3.28, meters to yards: x 1.094

to get kilometers: multiply miles by 1.61
kilometers to miles: x 0.62

Posted by Evon Spangler at 7:43 PM
Labels: bike fit, heart rate, heart rate formula, inseam crankarm length

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About Me

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Evon Spangler
St. Paul, MN, United States
Evon M. Spangler graduated from William Mitchell College of Law in January 1998 cum laude. She is the co-founder and managing partner of Spangler and de Stefano, PLLP where she focuses her practice in the areas of family law, business law, civil litigation, and appeals. Ms. Spangler has extensively spoken and published, most notably in the areas of family law, and judicial independence. She is active in the community serving on numerous boards and committees, and provides significant pro bono services to disadvantaged persons.
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The Best Running Resources

  • Newton Shoes
  • The Best Runners Core Workout DVD
  • Ultimax Ironman Socks--the best sock to run in
  • Raceberry Jam--Find a race in the Twin Cities
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  • Runners World Online
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