We chose to use the latest sensor technology by Philips in order to offer one of the most reliable sensors on the market.

First and foremost, it is important to correctly position the watch on the wrist:

Your watch must be firmly fastened while being comfortable. If the fastening is too loose, the watch will not be able to accurately measure the signal.

Heart rate measurement with a wrist heart rate monitor (optical sensor) is optimal when practising sports with repetitive movements such as running or cycling.

It is recommended to use a chest strap for fitness sports (bodybuilding, etc.)

To improve the measurement of a heart rate signal at the beginning of an activity, start the activity a few minutes before your session to allow time for researching the satellites and the heart rate signal. When ready, you can start the stopwatch.

Some factors can however affect the measurement of the heart rate:

- The analysis of the blood flow (pulse) via a light signal can never be as fast as the electromagnetic signal of HR chest straps.

- The watch is positioned away from the heart, the blood will take some time to flow to your wrist. During interval training, there will be some latency in the heart rate signal measurement.

- In cold weather, the blood system is affected by the reduction in the diameter of blood vessels that your watch may read as a high or low heart rate.

- Vascularisation may be different in your left and in your right arm. If the results are not optimal on one arm, try the other arm.

- Similarly, if you have tattoos where the watch is positioned, the heart rate cannot be measured.