Originally Posted by
UberGeek
Sounds about right, assuming you have no metabolic diseases. 21 miles nets me about 1000 calories, and I'm not far off of your weight. I use Runkeeper, however, I assume both have similar formulae for calculating burn rate.
Now, I'm presuming it's accurate, because I also use MyFitnessPal to log meals. And, I am scheduled to lose 1.5 lbs per week. And, I am not far off the mark, average about 1.4 lbs per week in weight loss.
Don't assume accuracy. HR monitors use very different algorithms for this, and report widely differing results. If one has a powermeter one can make a reasonably accurate calculation, because it record how many kilojoules are produced and kilojoules divided by four is approximately Calories burned. Those who use powermeters consistently report Calorie consumptions lower than HR monitors alone, in my experience.
I weigh 195lbs. For me to burn 600 calories riding 14 miles on a flat, windless road I'd need to be riding at close to 22 mph.