21/01/2026
The other day, doing 800m road intervals, my Garmin watch broke and is irreparable. I am in no hurry to replace it, being quite happy to use a basic Casio stopwatch. Which got me wondering as to how useful (and accurate) is the data we get from such watches. For example, I can manually take my resting heart rate, giving me a snapshot of my state of health, fitness and recovery rather than using HRV.