# Rival HR N/A inaccurate **URL:** \ **Category:** Equipment\ **Created:** [September 17, 2024, 9:47pm UTC](https://wahoox.forum.wahoofitness.com/t/rival-hr-n-a-inaccurate/26387 "2024-09-17T21:47:03Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![dannyg](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/dannyg/32/19910_2.png) [@dannyg](https://wahoox.forum.wahoofitness.com/u/dannyg)\ **Post date:** [September 17, 2024, 9:47pm UTC](https://wahoox.forum.wahoofitness.com/t/rival-hr-n-a-inaccurate/26387/1 "2024-09-17T21:47:03Z")
Rival HR Tracking Garbage I’m on my second replacement Rival, thinking it was a hardware issue. Half of my workout for strength training, the HR is super low or N/A. I’ve tried multiple positions on the wrist, varied levels of tightness of the strap, cleaning the sensor, nothing. Same thing on the replacement. I tried the stair climber and about ten times in a ten minute session, HR was N/A. Anyone have similar experience? ---
**Author:** ![JSampson](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/jsampson/32/3148_2.png) [@JSampson](https://wahoox.forum.wahoofitness.com/u/JSampson)\ **Post date:** [September 17, 2024, 11:00pm UTC](https://wahoox.forum.wahoofitness.com/t/rival-hr-n-a-inaccurate/26387/2 "2024-09-17T23:00:23Z")
> [@dannyg](#): > > Anyone have similar experience? @dannyg Wrist based HR doesn’t work well for strength training. I would recommend pairing with a strap. That is what I do. Also wrist based measurement can vary from person to person based on wrist size, arm hair, etc. ---
**Author:** ![dannyg](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/dannyg/32/19910_2.png) [@dannyg](https://wahoox.forum.wahoofitness.com/u/dannyg)\ **Post date:** [September 18, 2024, 2:26pm UTC](https://wahoox.forum.wahoofitness.com/t/rival-hr-n-a-inaccurate/26387/3 "2024-09-18T14:26:19Z")
Why doesn’t it work well? Doesn’t make any sense ---
**Author:** ![JSampson](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/jsampson/32/3148_2.png) [@JSampson](https://wahoox.forum.wahoofitness.com/u/JSampson)\ **Post date:** [September 18, 2024, 2:44pm UTC](https://wahoox.forum.wahoofitness.com/t/rival-hr-n-a-inaccurate/26387/4 "2024-09-18T14:44:41Z")
@dannyg. This link provides a good overview of the issues with wrist based measurement. As I noted in my earlier post it also varies person to person which is why I recomend using a chest HRM paired to the watch. > **[Optical HR Armband Shootout: Polar OH1+, Scosche Rhythm24, Wahoo TICKR FIT](https://www.dcrainmaker.com/2019/04/shootout-schosche24-polaroh1.html)** > > The last few weeks, well…months really, I’ve been spending an excessive amount of time wearing optical HR sensor straps. It mostly started back in January as I was preparing my Polar Vantage M and COROS APEX reviews, with the optical _Anyway – the reason I like armband optical HR sensors such as the three compared here – is that they tend to be very accurate. That’s primarily because it’s an incredibly good place to measure your heart rate. Unlike your wrist, there’s usually a bit more ‘flab’ and ‘chunk’ for really good quality readings. Additionally, your upper arm tends to absorb the vibrations that your wrists don’t in certain applications, like riding. Further, for indoor hand-driven workouts (like weights), again, your wrist being strained also can produce issues with optical HR sensors like those in a watch. But upper arm? Very rarely an issue here, even when under strain in the gym._ ---
**Author:** ![dannyg](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/dannyg/32/19910_2.png) [@dannyg](https://wahoox.forum.wahoofitness.com/u/dannyg)\ **Post date:** [September 18, 2024, 2:59pm UTC](https://wahoox.forum.wahoofitness.com/t/rival-hr-n-a-inaccurate/26387/5 "2024-09-18T14:59:44Z")
Great read, thank you