Guides
What the numbers in the spec sheet mean, which of them will matter to you, and what to do with the watch once it is yours. Every figure here is either physics, a published standard, or a number from the same catalogue the finder ranks — so you can click through and check it.
Choosing a watch
Work out what you need before you spend anything.
Battery claims, and what they mean on a real long runQuoted GPS hours assume the cheapest satellite mode, the screen off and no music. Here is what to subtract, and how to pick a number you can trust.
MIP or AMOLEDThe most divisive spec in the category, and there is no right answer. What each screen is actually good at, and which one suits how you run.
Multiband GPS: when it matters and when it is marketingDual-frequency GNSS is the one accuracy feature that survives contact with reality — but only where the sky is broken. Where it earns its battery cost.
Which Garmin, actuallyForerunner, Fenix, Enduro, Instinct, Venu — overlapping ranges nobody can explain. What each one is for, and where the lines genuinely fall.
Living with it
Fit, rotation, mileage and knowing when a pair is done.
Wrist size, case size, and why watches get sent backThe specification nobody reads. How to measure your wrist, what the published strap range does and does not tell you, and where the line actually sits.
Wrist or chest: which heart rate to trustOptical wrist sensors are good at steady efforts and poor at sudden ones. Where each is reliable, and when the number on your wrist is lying to you.
Training load and readiness, and how much to believeWhat your watch is calculating when it tells you to take it easy, which parts rest on real physiology, and where to trust your legs instead.
The first week with a new watchThe handful of settings that change what the watch is like to own, and the ones to leave alone. Twenty minutes now, months of not being annoyed.