Activity HR
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 Yesterday went for exercise(walking) and HR reading was crazy 
  Also max speed was little higher for a walk :))))) Anyone had similar experience? Thx. 
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 @djordje-s pretty well known for S9, it is a somewhat bulky watch that bounces around a lot. I have decent (and sometimes good) results only using the velcro strap. 
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 @djordje-s 
 S9 or S9P ?
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 @mff73 S9 
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 I had similar wrong values up to 220. 
 The solution was to pull the strap around 1-2 holes tighter, because it had lost its flexibility over the time.
 On cold conditions it has to fix very tight for good results - in my case.
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 @reiner Doing that every time and 2 fingers from wrist  

