VeryFit DocsHealth Monitoring
Heart rate, step counting, and sleep tracking accuracy
Which factors affect the accuracy of heart rate readings?
Factors like wearing the device too loosely, swinging your arms, or sliding of the device over your skin can impact heart rate readings. In addition, wearing the device too tightly, raising your arms, or clenching your fists can affect blood circulation, which also affects sensor performance. When testing your heart rate, it is recommended that you keep your arm straight, remain static, and relax your muscles. Ensure that the device remains in close contact with your skin.
Note: Even when you wear the device correctly, individual differences such as skin color, body hair, tattoos, and scars can also affect heart rate sensor performance slightly.
Which factors affect the accuracy of step counting?
The accelerometer and algorithms that the device uses to count your walking steps are highly sensitive, even small differences may affect the accelerometer and algorithms. You must provide accurate personal data during the device's initial configuration. For example, if you enter wrong gender, height, weight, or age, it would result in inaccurate exercise data, such as incorrect counting of steps, distance, or calorie.
In addition, factors such as your arm swing, stride, posture, road surface, and slope can also affect the step count.
Why doesn't the device count my steps as soon as I start walking?
To improve step count accuracy, the device has a minimum threshold of ten steps. This means that the total step count shown in the App only changes when you take more than 10 steps. The device starts recording data after your tenth step and only saves data when you have completed 30 steps.
Why can't I sync sleep data? Why is the sleep data inaccurate?
- Ensure that you always wear the device when asleep; otherwise no sleep data will be available when you sync the device with the App.
- Sleep will be tracked around the clock. However, your sleep will be recorded only if it lasts for three hours (there are three stages of sleep: deep sleep, light sleep and REM sleep). Going back to sleep after getting out of bed, sleeping in, or playing with mobile phone in bed will affect the recording of your sleep.
- If you don't wear the device before going to bed, or if you take off the device immediately after getting up, the recorded sleep time will be prolonged or inaccurate.