What are sizes for polar heart rate monitir

I'm super emasculated by Anonymous as a man with a 32" chest. The medium was too big after some uses given they stretch out. These need to fit quite snug enough that they are slightly uncomfortable and after about 5 minutes the uncomfortableness goes away. Just tight enough not to slip is NOT tight enough if you want consistent, accurate readings. Also, check to make sure it is snug throughout your entire breathing cycle. A snug fit might feel loose when you breath very hard. I now wear the XS-S with it set at a 25" circumference which with a 7" stretch. It still feels very comfortable (meaning I never noticed it) on my 4 hour+ mtb rides, though it's quite tight when I first stretch it on. This tight fit does not leave any marks on me, and I expect after about 10 more rides I'll need to shorten it up another inch, so make sure you have room to snug it up. The M-XXL once clasped is 28.5" to 36.5" at it's longest adjustment. Add normal 6-8" inches of stretch, and you should be able to tolerate an appropriate fit at least up to 44.5", and probably larger. I think you guys with the mid 40" chest may not be used to how these straps should feel since the M-XXL is at least a couple inches big for me on its tightest adjustment. FINALLY ******Too bad we even have to ask and answer this question though. It's super disappointing Polar does not accurately post what chest measurent range each size strap properly fits (not too tight, not to loose), how to take a proper measurements, and how to test you have a proper fit. We shouldnt each have to waste time googling. searching their documents and website, contacting their support, reading reddit, and asking amazon users and still not find a good answer. And it's sad the one person from polar that responded here just through up a stretch range for each without more commentary on getting the proper size. I hope Polar will respond and put together a useful document for proper sizing.********

Does the strap provide continuous heart rate monitoring? Can I wear it 24/7?

You can wear it 24/7. Having worn a medical chest ECG monitor for 10 days, it was a bit awkward at first but got used to it. Depending on your expectations, such as accuracy, a chest monitor can't be beat. Tried wearing Fitbit Charge 5 and Apple iWatch 6 simultaneously during HIIT sessions for months, they both varied as much as 10 bpm from the other. Decided to go with chest monitor.

To those with experience changing battery, is the flip cap easy to open/close? H7 used a coin slot on soft plastic, so edges rubbed off=hard to open

I found the H7 to be of the poorest design compared to the ease of changing the battery in the H10. I can’t tell you how many of my clients disliked the H7. I think you will love the ease of the H10 battery replacement.

What app do u download w the heart monitor?

Hi Christy, the Polar H10 is compatible with many apps and devices, the two Polar apps you can use are Polar Beat or Polar Flow, both can pair to your H10 Sensor so you can view and record your training sessions.

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❤️‍🔥 Track Every Beat, Own Every Moment! 🚴‍♂️

GO PRO INTEGRATION - Overlay your heart rate data directly onto your GoPro Hero 5 videos to relive every beat of your performance.
LONG LASTING POWER - User-replaceable battery delivers up to 400 hours of uninterrupted tracking, so you never miss a moment.
SEAMLESS MULTI DEVICE SYNC - Connect effortlessly via ANT+ and Bluetooth to fitness apps, cycling computers, and smartwatches for real-time data.
ALL DAY COMFORT SECURE FIT - Adjustable chest strap fits 22-34 inches with a redesigned soft strap that stays comfortable and secure during any activity.
BUILT IN MEMORY FOR ON THE GO - Store a full heart rate session without needing a wrist unit—ideal for intense workouts and outdoor adventures.

The Polar H9 Heart Rate Monitor combines ANT+ and Bluetooth connectivity with waterproof durability and a comfortable chest strap, delivering precise heart rate tracking for cycling, running, swimming, and more. Featuring built-in memory for standalone sessions, GoPro compatibility, and up to 400 hours of battery life, it’s engineered for professionals who demand accuracy and versatility in every workout.

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Color	Black
Size	XS-S
Style	H9
Team	Polar H9
Compatible with	Smartphones
Display Size	0.96 Inches
Weight	2 Kilograms
Material Type	Plastic
Number of Items	2
Power Source	Battery Powered
Season	All Weather
Sport	Cycling, Exercise & Fitness, Running, Swimming
Included Components	Heart rate sensor, soft strap
Batteries Included?	Yes
Description Pile	Lithium-Ion
Brand	Polar
Department	Unisex
Manufacturer	Polar
Item model number	H9
Product Dimensions	3.4 x 6.5 x 1 cm; 60 g
ASIN	B08411CZYL

PolarHeart Rate Monitors - ANT +, Bluetooth - Waterproof HR Sensor with Chest Strap - Built-in memory, Software updates - Works with Fitness apps, Cycling computers, Sports and Smart watches

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