How accurate are the wrist-based heart rate monitors during walking and running activities? Are they accurate enough?

Background Heart rate (HR) monitors are valuable devices for fitness-orientated individuals. There has been a vast influx of optical sensing blood flow monitors claiming to provide accurate HR during physical activities. These monitors are worn on the arm and wrist to detect HR with photoplethysmography (PPG) techniques. Little is known about the validity of these wearable activity trackers. Aim Validate the Scosche Rhythm (SR), Mio Alpha (MA), Fitbit Charge HR (FH), Basis Peak (BP), Microsoft Band (MB), and TomTom Runner Cardio (TT) wireless HR monitors. Methods 50 volunteers (males: n=32, age 19–43 years; females: n=18, age 19–38 years) participated. All monitors were worn simultaneously in a randomised configuration. The Polar RS400 HR chest strap was the criterion measure. A treadmill protocol of one 30 min bout of continuous walking and running at 3.2, 4.8, 6.4, 8.0, and 9.6 km/h (5 min at each protocol speed) with HR manually recorded every minute was completed. Results For group comparisons, the mean absolute percentage error values were: 3.3%, 3.6%, 4.0%, 4.6%, 4.8% and 6.2% for TT, BP, RH, MA, MB and FH, respectively. Pearson product-moment correlation coefficient (r) was observed: r=0.959 (TT), r=0.956 (MB), r=0.954 (BP), r=0.933 (FH), r=0.930 (RH) and r=0.929 (MA). Results from 95% equivalency testing showed monitors were found to be equivalent to those of the criterion HR (±10% equivalence zone: 98.15–119.96). Conclusions The results demonstrate that the wearable activity trackers provide an accurate measurement of HR during walking and running activities.

[1]  U. Ekelund,et al.  Effect of combined movement and heart rate monitor placement on physical activity estimates during treadmill locomotion and free-living , 2006, European Journal of Applied Physiology.

[2]  M. Gorelick,et al.  Validity of the Smarthealth Watch to Measure Heart Rate During Rest and Exercise , 2011 .

[3]  C. M. Pastre,et al.  Comparison of Polar® RS800G3™ heart rate monitor with Polar® S810i™ and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest , 2016, Clinical physiology and functional imaging.

[4]  P. Montgomery,et al.  Validation of Heart Rate Monitor-Based Predictions of Oxygen Uptake and Energy Expenditure , 2009, Journal of strength and conditioning research.

[5]  R. Maddison,et al.  Global positioning system: a new opportunity in physical activity measurement , 2009, The international journal of behavioral nutrition and physical activity.

[6]  R. Laukkanen,et al.  Heart rate monitors: state of the art. , 1998, Journal of sports sciences.

[7]  Jakub Parák,et al.  Evaluation of wearable consumer heart rate monitors based on photopletysmography , 2014, 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[8]  Zohn Rosen,et al.  Validation of photoplethysmography as a method to detect heart rate during rest and exercise , 2015, Journal of medical engineering & technology.

[9]  Nils Grundström,et al.  Comparison of heart rate measured by Polar RS400 and ECG, validity and repeatability , 2012 .

[10]  D. Altman,et al.  STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENT , 1986, The Lancet.

[11]  B. Dolezal,et al.  Validity of Seven Commercially Available Heart Rate Monitors , 2002 .

[12]  Gregory J Welk,et al.  Validity of consumer-based physical activity monitors. , 2014, Medicine and science in sports and exercise.