If you enjoy running, hiking, swimming, cycling or pretty much any outdoor activity, a smart watch can help you train and race better, reduce the risk of injury and avoid getting lost.
Most watches have heart rate sensors built in or the ability to connect a chest strap for accurate readings to tailor your training to a specific heart rate zone and lett you monitor your VO2 max.
After a hard session, you can receive suggestions on length of recovery and asses how well your body is functioning with certain exercises.
With the improvement in GPS, watches have become a second friend in guiding you along the trail or linking up to Strava and analysing your performance.