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While I don't have the algorithm, I do have a pretty decent sized library of .sdf files of exercises. From which someone could almost certainly reverse engineer something very close to the energy expenditure model. I have a strong suspicion it is mostly exponential smoothing.


It's doubtful your heart rate was in sync; you can't really state that without monitoring. You can measure your stride: it's usually around 160 (strides per minute), with a lot of conventional running gurus touting 180 as better for a variety of reasons. Your breathing and stride can be matched up and this whole thing is known as locomotor-respiratory ...

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