We love data! Polar makes some of the best heart rate readers for the wrist, and more than that, Polar wearables track your sleep, recovery, and can even make recommendations on what type of workout—or additional recovery—you should focus on each day. Additionally, the Polar watch works with the Polar app, available on both iOS and Android, so no matter what phone you have, the Polar works with your device. For our Les Mills fans, all Les Mills workouts are available for tracking in the watch and app, so just show up to your fave Les Mills class (or use LM+ at home), select the workout type on your watch, and you're ready to rock.

There are plenty of Polar models, but take a look at the Ignite and Unite in particular to get started.