The built-in app will automatically record each mile as an individual lap, but you can't manually record one or change the distance at which it is automatically recorded. There is no interval training whatsoever. The watch also doesn't include Auto Pause, which will pause the watch automatically when you stop running, a useful feature for routes with frequent stop lights.
While testing the GPS can be difficult in New York City, I found the results to be on par with other watches I've been using. It generally took anywhere from 30 seconds to a couple of minutes to acquire a signal. The watched performed better in the suburbs of New Jersey, locking onto a signal within seconds on a day without significant cloud cover. You likely won't run into GPS problems, weather permitting.
After you complete a run, the watch displays plenty of data -- time, distance, average pace, best pace, average BPM (heartbeats per minute), max BPM, calories burned, calories burned per minute, different heart-rate zones (along with how long you were in them) and lap splits. It doesn't estimate cadence (steps per minute) or measure elevations, which is odd given that the specs sheet lists an altimeter.
A map of the run and various charts (heart-rate, calories burned and pace) can be viewed in the MotoBody app on Android (it's not available on iOS). Workout data from the app can also be shared with Google Fit, Under Armour Record, MapMyRun, Strava and Fitbit.
A 30-minute run with the GPS dropped the battery down to 85 percent. After an hour run it was down to 60 percent. That's a problem. Motorola hasn't said how long the Moto 360 Sport would last with a continuous GPS signal, but I am quite certain it wouldn't be over four hours.
The Garmin Forerunner 235, which costs $30 more than the Moto 360 Sport, lasts 11 hours with an active signal, and up to 9 days with activity tracking, smartphone notifications and heart rate enabled.
The Moto 360 Sport will have to be charged daily. Period. The watch wouldn't even last 12 hours on days I went for a run, which is unacceptable. If you don't use the GPS you could squeeze out 24 hours of usage, but you shouldn't get this watch if you don't need GPS. Get the Huawei Watch or regular Moto 360 instead.
Should you buy it?
Last year's Moto 360 was a perfectly good smartwatch for those interested in an Android Wear device. Unfortunately, the Sport model falls short, and there is no part of me that can recommend it in its current form.
If you are interested in a GPS running watch with smartphone notifications you should check out the Fitbit Surge or the Garmin Forerunner 235. Both are equipped with GPS, optical heart-rate sensors, and can display notifications for texts, emails and calls. They aren't full-blown smartwatches, but they will deliver a more enjoyable experience both when running and during all-day wear.
Don't need smartphone alerts? The Garmin Forerunner 225 is still my top choice.