The best way to estimate without using a heart rate montior would be to add the walking and running as two seperate entries. Then you won't be overestimating by calling it all running, or underestimating by calling it all walking.
Hope that helps,
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford
"No matter how slow you go, you are still lapping everybody on the couch."
Would it be possible to figure out how many calories you expend doing interval running--such as couch 2 5k programs? I know for myself I work *much* harder than I do when I walk, which is what the current couch 2 5k programs tracks, and I'm worried about accuracy since I'm petite and don't want to burn too many calories.
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