I have always wondered how to measure the calories expended during a training session (I practice Aikido, but this is a general question regardless of art or style) and I have found little advice on that.
My question: has anyone tried wearing one of the various fitness tracker armbands/bracelets/gizmos (like fitbit or any of the other models out there) for the whole duration of a lesson? I.E. warm-up, kata, kumite, randori, whatever your style does?
Any results? Do these things "recognize" movements outside of running/jogging/walking? I.e. assuming I tried one while doing Iaido, would the sword swings register at all, even if I am standing more or less in place? What about falls/throws? Has anyone tried this already? Results?
I am not so obsessed by the idea in itself to go out and buy one for myself, because even if I had one, I'd use it a few times during my Aikido practice to get a general idea, and for the rest of the time it would probably stay in a drawer... this is why I ask instead of actually trying myself.
UPDATE: a couple weeks ago (Jun 2022) I informed the other participants that I would wear an Apple Watch (Series 3) for the duration of the training. The results were ~300 Calories/Hour. The practice was not particularly strenuous but I think it is a bit on the low side. Maybe wearing it on the wrist does not provide the best results.