![What is the purpose of an elastic band around the chest (just under the breast area) when running? - Quora What is the purpose of an elastic band around the chest (just under the breast area) when running? - Quora](https://qph.cf2.quoracdn.net/main-qimg-e7d2ce90427fbbb88de010f4e841a3e9.webp)
What is the purpose of an elastic band around the chest (just under the breast area) when running? - Quora
![SportPlus Bluetooth 4.0 Chest Strap Heart Rate Monitor for iOS (From 7.1), Android (from 4.3) and Windows Phone, Optional with ANT+ And 5.3 Khz : Amazon.co.uk: Sports & Outdoors SportPlus Bluetooth 4.0 Chest Strap Heart Rate Monitor for iOS (From 7.1), Android (from 4.3) and Windows Phone, Optional with ANT+ And 5.3 Khz : Amazon.co.uk: Sports & Outdoors](https://m.media-amazon.com/images/I/51UwcSSYMGL.jpg)
SportPlus Bluetooth 4.0 Chest Strap Heart Rate Monitor for iOS (From 7.1), Android (from 4.3) and Windows Phone, Optional with ANT+ And 5.3 Khz : Amazon.co.uk: Sports & Outdoors
![Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running Fitness Technologies Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running Fitness Technologies](https://res.cloudinary.com/afs-assets/image/upload/w_560,h_746/q_auto,f_auto/v327102019/product-large/92081565/92081565-4.jpg)
Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running Fitness Technologies
![High Quality Elastic Chest Belt Soft Strap Band For Polar Sport Running Heart Rate Monitor For Bluetooth Adjustable - Walmart.com High Quality Elastic Chest Belt Soft Strap Band For Polar Sport Running Heart Rate Monitor For Bluetooth Adjustable - Walmart.com](https://i5.walmartimages.com/asr/2193d2a1-f354-4cb0-92d1-3a0685b82dab.04eab81974c6d9e19d4ebc005bf52954.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
High Quality Elastic Chest Belt Soft Strap Band For Polar Sport Running Heart Rate Monitor For Bluetooth Adjustable - Walmart.com
![High Quality Elastic Chest Belt Soft Strap Band For Polar Sport Running Heart Rate Monitor For Bluetooth Adjustable - Walmart.com High Quality Elastic Chest Belt Soft Strap Band For Polar Sport Running Heart Rate Monitor For Bluetooth Adjustable - Walmart.com](https://i5.walmartimages.com/asr/d4b1d003-36d4-4dc8-8b99-6ad15b7d30a0.c0499d8e3fd62bdf113a0abf5b21f1c1.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)