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Nah, for me its a genuinely useful way of keeping on top of my health, training levels and possible fatigue to avoid overtraining. Accurate all day HR is also useful for spotting when you are coming down with a virus early.
The pulsox feature on my vivosmart is also useful for altitude acclimatisation when I'm climbing (because my old model fenix doesn't have that feature).
All day HR tracking is a surprisingly powerful tool. Do I need it? Clearly not as I have lived 38 years without one. Its not a gadget thing for me though, being able to look at a continuous HR history is really useful to me.
Can someone explain to me what the appeal of these measurement watches is like vivosmart / fitbit / etc.?
Is it just blokes being gadget nerds?