![Fitbit's 100+ Billion Hours of Resting Heart Rate User Data Reveals Resting Heart Rate Decreases After Age 40 | Business Wire Fitbit's 100+ Billion Hours of Resting Heart Rate User Data Reveals Resting Heart Rate Decreases After Age 40 | Business Wire](https://mms.businesswire.com/media/20180214005548/en/640823/23/Resting+Heart+Rate.jpg)
Fitbit's 100+ Billion Hours of Resting Heart Rate User Data Reveals Resting Heart Rate Decreases After Age 40 | Business Wire
![Association of resting heart rate and its change with incident cardiovascular events in the middle-aged and older Chinese | Scientific Reports Association of resting heart rate and its change with incident cardiovascular events in the middle-aged and older Chinese | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-019-43045-5/MediaObjects/41598_2019_43045_Fig1_HTML.png)
Association of resting heart rate and its change with incident cardiovascular events in the middle-aged and older Chinese | Scientific Reports
![Exercise-mad British pensioner found to have world's slowest EVER heart rate | UK | News | Express.co.uk Exercise-mad British pensioner found to have world's slowest EVER heart rate | UK | News | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/1/590x/secondary/158923.jpg)