How do fitness trackers measure pace?

The most popular activity trackers and smartwatches (such as Apple, Amazfit, Coros, Fitbit, Garmin, Honor, Huawei, Polar, Samsung, Suunto, Withings and Xiaomi products) use an accelerometer to detect movement. This detects acceleration, which is the change in velocity relative to time. A portable tracker continuously detects body movements on a 3-axis accelerometer. The data is recorded every time it is worn and turned on, allowing the tracker to track if the person is walking forward, running fast or even staying still.

This may seem like an overwhelming requirement, but for people who have less experience with fitness programs or exercise regimens, buying a fitness tracker could be an excellent step in the right direction. Just keep in mind that buying a fitness tracker alone won't be enough to establish an exercise routine in your life. The best fitness trackers also use software, social media connections and progressive goals to continue to advance people in their fitness level. We've tested dozens of portable devices to help you find the one that best fits your lifestyle, whether it's a smartwatch for everyday use, a fitness tracker or a running watch.