Published on in Vol 7, No 10 (2019): October
![Heart Rate Measures From Wrist-Worn Activity Trackers in a Laboratory and Free-Living Setting: Validation Study Heart Rate Measures From Wrist-Worn Activity Trackers in a Laboratory and Free-Living Setting: Validation Study](https://asset.jmir.pub/assets/57601375ba16d1f06aead36e65f8e4fa.png 480w,https://asset.jmir.pub/assets/57601375ba16d1f06aead36e65f8e4fa.png 960w,https://asset.jmir.pub/assets/57601375ba16d1f06aead36e65f8e4fa.png 1920w,https://asset.jmir.pub/assets/57601375ba16d1f06aead36e65f8e4fa.png 2500w)
1 Health Systems & Behavioral Sciences, Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
2 Centre for Sport & Exercise Sciences, University of Malaya, Kuala Lumpur, Malaysia
3 Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
4 Yong Loo Lin School of Medicine, National University of Singapore, National University Health System, Singapore, Singapore
5 Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
6 Health Promotion Board Singapore, Singapore, Singapore
7 Institute for Social Medicine, Epidemiology and Health Economics, Charite University Medical Centre Berlin, Berlin, Germany