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From Fellrnr.com, Running tips
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My initial disappointment I was initially very disappointed with the {{Polar M400}} has reduced , but over timeI've come to appreciate the M400 more and more. There are a number of factors, not least of which is that it's now on sale sells for far cheaper less than its release price, making it far a lot more competitive. Its [[GPS Accuracy]] has also improved, though it still mediocre. This accuracy problem is offset by its reasonable support for the [[Stryd]] Footpod that is extremely accurate. The main competition the M400 faces is the [[Garmin Vivoactive]]. The Vivoactive is a better watch in virtually every respect, except for its Stryd support. In order to get the Vivoactive to get pace and distance information from Stryd you have to turn off GPS, while the M400 can use Stryd for pace and distance whilst still recording a GPS track.
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{{DISPLAYTITLE:Polar M400 Review}}
[[File:Polar M400.jpg|right|thumb|200px|The {{Polar M400}}.]]
* '''How far did I run?''' This is the most basic question, and the M400 has poor GPS accuracy, but this can be offset by using the Stryd Footpod. It may seem odd to spend more on a Footpod than the watch, but I'd argue this is actually a reasonable compromise.
* '''How fast am I running?''' Knowing how fast you're running can be a nice to know, or it can be vital for your training or race performance. Because of the nature of GPS, watches that rely on GPS signal alone tend to have serious problems with current pace. With the Stryd Footpod, you can get extremely accurate pace information, but without it, the M400 is pretty hopeless.
