
Simultaneousely, ECG measurements were recorded. All devices were tested on 35 participants with six timed measurements during 20 minutes constant load bicycle ergometer workout for each. Tested devices were: Garmin Forerunner 35 (Garmin), Mio Fuse (Mio), Fitbit Charge HR (FitbitHR), Fitbit Surge (FitbitS), Withings Pulse™ Ox (Withings), Apple Watch Series 1 (Apple) and Pearl Fitness-Tracker (FBT-50.HR PRO.V4). Aim of this study was validation of measurement accuracy of seven different devices against ECG-monitoring during cardiac rehabilitation training on a bicycle ergometer. Self-heart-rate-monitoring in daily life is an important point for health awareness of cardiac patients. Physical activity is a major approach in prevention and therapy of cardiac diseases. The leading cause of morbidity and mortality in the world is ischemic heart disease.
