# Estimating burnt kcal from one type of activity when measured by heart rate and measurement assumes different activity?

I have a certain watch that can be linked to a heart rate monitor. It then will give me the amount of calories based on the premise that I am running. However, obviously the watch can be used also for monitoring my heart rate during other activities, such as biking.

Given this setup:

• does the calorie consumption only depend on the heart rate or also on the mode of movement?
• assuming it depends on the mode of movement, can I "convert" my calories that were calculated based on the assumption that I was running into those for biking? A rough estimate is sufficient as we're talking hundreds of kcal, so I can subtract a bit more to make a conservative estimate.
• can you please give the sources for your answers?!

TL;DR

There is or isn't a difference between running at 160 bpm for 10 minutes and biking at 160 bpm for 10 minutes? If there is, how to estimate from one mode of movement for another?

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– arober11 Mar 4 '15 at 1:11