Actually scratch that. Haven't used it for a while and just noticed the light was off. I'm wondering if any sudden movement activates it. If it is smart about determining changes in activity, I'm ok with it. I guess it makes sense that my heart rate isn't going to spike for a long period of time while sitting and doing nothing
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This. Exactly. The band is quite smart and will start saving battery when it sees that you are not moving much. It has at its disposal many other sensors to make this decision.
You're basically saying I am out of line for expecting a 100 in 1 product to do anything well because why should it? It's 100 products IN ONE!!! It really just comes down to false marketing. Microsoft is marketing the "continuous" heart rate monitoring feature IDENTICALLY to the way Mio advertises their continuous heart rate feature (albeit the ONLY feature).
Pj737: Like I said, you are not wrong in interpreting and expecting "continuous" to be many or hundreds of times per hour. The crux of the issue is by definition what you are saying is also continuous and what others are saying is continuous as well. As an example see the attachment below. I would describe it as: "
MSFT Band monitored my sleep and heart rate continuously last night". I don;t know why I would not call it continuous?
Every digital signal in this world is by definition not continuous because it is sampled at some rate from a truly continuous analog signal. But given an application and requirement, even 100,000 data points per second could be sparse (for example when analyzing a car crash test) versus 1 data pt./sec could be continuous and more than necessary for something like monitoring with a sensor when its dark outside. In both cases, the sensing is unbroken and periodic but depends which is considered "continuous". We are simply splitting hairs and talking semantics.
MSFT probably deemed that by making clever use of many of the other sensors they can continuously and intelligently sample heart rate to build a whole-day trend while also providing all the additional functionality. Trust me, MSFT has a very deep research presence and they employee some of the top people in health, fitness, bioengineering, and other sciences. Just as an example, MSFT is researching HIV vaccinations and are building cloud machine learning algorithms for curing cancer all the while they study how HR signals could be used for preventive healthcare. Google for "Microsoft Research" and see for yourself. Don't take my word for it. The HR on this device is backed by science, not just consumer product wannabe.