This is definitely the athlete’s wristwatch. With a small face and a light silicone strap, the Garmin Forerunner 735XT is so comfortable, most users will forget it’s even there. More importantly, it tracks all the most essential data: from heart rate and calories to steps and sleep patterns. With various exercise and sports profiles to choose from, the water-resistant tracker is a great way to track swimming activity too. It can also be expanded upon, with the addition of a heart rate strap, to measure more detailed metrics and underwater heart rate tracking for serious swimmers.