Running faster but burning less calories?

I tracked my running on DB for yesterday and today….yesterday I ran 2.2 miles in 26 minutes and DB said I burned about 164 calories, today I ran with my Dad so I was slowed down and did the 2.2 miles in 40 minutes. Now why would DB say I burned more calories today, 213 for the 40 minutes, if I was going slower?

http://www.active.com/walking/Articles/Running_… This might help..good luck another good article..
http://www.unm.edu/~lkravitz/Article%20folder/c…

Realistically you are burning about 100 calories per mile, regardless of your speed. you burn more per minute if you are going faster but if you go the same distance its about the same. there are slight variances depending on how hard you are working but its a pretty good average to say 100 / mile.

Well I understand most of what you said, but why would daily burns calculator not account for that, since running faster will burn more calories and it says I burned more calories walking than I did running…even though it was the same distance

I think this is the point where we all admit DB is not always accurate in its calorie burned estimates. Actually, there really is no way to be completely accurate with the amount burned. But for loosing weight, fast paced walking is generally tops; running is more for cardiovascular endurance, unless you but HIIT and then it’s a whole new ballgame.

@larka , theoretically you should have burned the same amount of calories.

you were exercising for substantially longer when you went slower (26 vs 40 mins) so DB calculates that as more energy burned i guess.

its all an imperfect science, best bet is to get a heart rate monitor,

yea i got a HR monitor and it helps give me an accurate picture.

also something to consider and i dont know what algorythim DB uses to calculate cal burned but most the cardio equipment adds in your base cal burned per min to the amount burned on the actual machine.

for instance your body has a amount of cal its going to burn no matter what your doing. so obviously if you add that amount to the total your base cal burn per min total for 40min is going to be higher then your one for 26. in the algorythim its taking yout body stats figuring out what your at rest cal burn is then multiplying that by min of the exercise then adding in the additional cal burned by the exercise itself.

thats the only thing i can think of that would effect the cal burned dif greatly when doing the same work but at dif lengths of time.

even the best calculation though is just an estimate without more detailed tracking like that of a HR monitor.

When the machine would count your BMR Kcals it would almost not be noticable on a minute base. The average person burns about the Kcals of an Egg (around 70 – 80 Kcals) an hour when in rest. So in the best cast that would show up in a machine as 1, 1 1/5 Kcals a minute :)
HR monitors are also not so reliable. When you really want to have a reliable reading you should take a lab test but that would be a bit overboard for the most of us

Keep in mind, that while you are exercising, your body still burns calories that it needs to do everything that it needs to do. While this probably doesn’t add up completely to the difference, its still something to consider.