Garmin

2 lurkers | 223 watchers

Sam Jelfs Feb 2021 6:31pm, 20 Feb 2021 898 posts	Sam Jelfs The concept of optical works, transmissive photoplethysmography is used in clinical settings, and reflective is well proven, it's all about the implementation. For me wrist based works well, but it does depend on the shape of your pulse wave (which is linked to various things, arterial stiffness, blood pressure, etc.)
The_Saint Feb 2021 7:19pm, 20 Feb 2021 6,742 posts	The_Saint I will try the Polar on the wrist if I can get the strap tight enough, I usually have it on the inside of the left forearm.
SPR Feb 2021 7:30pm, 20 Feb 2021 33,332 posts	SPR Even if it works on the wrist it doesn't really prove much. There's good and very logical reasons why the locations suggested by polar work better, especially in exercise. The fact that there's not really any thoughts of needing it tight enough in those locations is another plus.
The_Saint Feb 2021 8:43pm, 20 Feb 2021 6,743 posts	The_Saint This is very much interests of science
The_Saint Feb 2021 8:56pm, 20 Feb 2021 6,744 posts	The_Saint I have just tried the Polar on the right wrist as a watch would be with a couple of elastic bands to achieve the necessary tightness and the 245 on the left wrist reading the signal from the OH+. I might run like this as I say in the interests of science and obviously for the twitter and bistedness that will result if this works as I believe it will
larkim Feb 2021 9:25am, 21 Feb 2021 13,562 posts	larkim Got to applaud those who look too take science forward 🤣
The_Saint Feb 2021 5:22pm, 21 Feb 2021 6,746 posts	The_Saint OK, science has been done and I wore the 245 in its normal place on the left wrist, deleted the OH1+ from the settings and wore the OH1+ on the right wrist like a watch and set it to record to itself. 6 mile run, moderate effort. The 245 reported an average HR of 158 fetcheveryone.com/t-18741402 the Polar OH1+ reported an average HR of 139 flow.polar.com Whether you think this proves anything or not is your opinion but my opinion is that the 245 firmware is broken.
flanker Feb 2021 7:25pm, 21 Feb 2021 19,683 posts	flanker firmware or sensor capability? I'd suspect the latter, as I'd expect firmware to exhibit consistent behaviour.
The_Saint Feb 2021 7:54pm, 21 Feb 2021 6,747 posts	The_Saint Well the 245 was fine for me until a device software/firmware (they seem to use these terms interchangeably) update in Oct or Nov.
chunkywizard Feb 2021 9:49pm, 21 Feb 2021 11,448 posts	chunkywizard Saint, try a hard reset (press and old light until the screen fades). It shouldn’t delete an data.