Polar Grit X Pro

£439, polar.com

The Grit X Pro has all the training insights and recovery smarts you’ll find on Polar’s other watches, including daily FitSpark workout recommendations, nightly recharge overnight recovery readouts, built-in GPS and optical heart rate tracking. But this tracker really excels when things get a bit more wild.

Its swim-proof 100m water-resistance and a military-grade toughness rating is backed up by improved turn-by-turn navigation, so you can push further and still get home. We also love the dedicated tests that benchmark your running and cycling performance, and recovery tests that add a layer of insights to your training decision making.

Design ★★★★★ Insights ★★★★★ OVERALL ★★★ ★