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From Fellrnr.com, Running tips
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* '''How far did I run?''' This is the most basic question, and the Ambit2 has good GPS accuracy, so this is one thing it does well.
* '''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. Without the ability to display current [[Pace From A Footpod]] while getting all other data from GPS, the Ambit2 can't answer this question very well. It does better than most watches that rely purely on GPS as it has good accuracy and the Suunto FuseSpeed may help a tiny bit. (That said, I frequently see the Ambit2 out by more than a minute/mile).
* '''Where am I? '''The Ambit3 has some basic navigation functions. There are no maps, but you ** '''Course Outline'''. This is an outline of a route that can download a course, and be downloaded. I've found this useful during ultras or in unfamiliar cities where I've needed to know where to go. Note that there's a no "back to startTrack Outline" which displays where you've been.** '''Back To Start'''. This is a simple arrow. So the Ambit3 point to your starting point, so it won't tell help you where you arebacktrack. ** '''Back To Waypoint'''. You can mark a location and use the arrow to point to it later. Again, but it this is a simple "as the crow flies" pointer. ** '''Compass'''. A magnetic compass can occasionally help you outorient yourself or the map. Without a magnetic compass you have to be moving for the GPS to give you a sense of direction.
* '''What's my cadence? '''[[Cadence]]''' '''is one of the most critical and often overlooked aspects of running. If you get your Cadence right, many other things naturally fall into place. The Ambit3 supports [[Cadence]] via a [[Footpod]] or it can estimate Cadence from its internal accelerometer, though I've found the internal accelerometer can be out quite a bit. Sadly it has no alerts for when your Cadence is too low.
For ultramarathon running the high end Ambit2 has the battery life for shorter ultras, but for runners that expect to be moving during the [[Second Dawn]], you'll have to compromise GPS accuracy for the Ambit2 to go the distance. See [[Best Running Watch#Watches for Ultrarunning| Watches for Ultrarunning]] for more details.
