Best running watches built-in heart rate monitoring: Garmin Forerunner 645 Music, £399, garmin.com The Garmin Forerunner is one of the priciest options in this list for a reason.

Cleveland Clinic researchers asked 50 healthy adults to wear various heart rate monitors, including an EKG while walking or running on a treadmill. When measured against the EKG, the chest strap heart monitor showed the most accurate readings.

Powr Labs Heart Rate Monitor Chest Strap - ANT + Bluetooth Chest Heart Rate Monitor with Chest Strap - HRM Run Bike Tri Cycling - Chest Strap Heart Monitor for Strava Zwift Wahoo Garmin Polar Peloton. 4.3 out of 5 stars 423. 11% off. $39.99 $ 39. 99 $45.00 $45.00. Lowest price in 30 days.

Using a heart rate monitor is the best way to get more data from your training sessions, and that's useful whether you're a novice runner, or a serious athlete.

The mioPOD heart rate monitor – paired up with the accompanying mioApp – is trying to bridge the gap between a passive heart rate sensor and a running watch.