So now that I have been running consistently with the 100/100 challenge, I noticed something on the treadmill, a calorie burn indicator. Now I know that it is dependent on weight, so I did a little search, and found the runners world running calorie burn calculator. I plugged in my time/distance/weight and got about 136 per mile burn rate. But then for fun I plugged in a 15;30(my old 5k PR) and it gave me the same exact calorie expenditure.

Few questions for those in this field of study, is that right first of all?? If I run a 15;30 5k or a 29 minute one, do I burn the same exact calories for the 3.1 miles? Doesn't seem right or possible to me, but maybe I'm missing something.

Next question is, how important if at all is fitness in this equation? Seems to me if you are a 2;30 marathon runner and 170 lbs vs a 4;30 runner at the same weight, wouldn't they have a different calorie burn for a 5 mile run?? How do all these calorie gadgets work with their softwares these days? I have no interest in them personally, but this got me to thinking, and something just doesn't seem right.

Please splain it to me.....