I took my brand new personal Garmin Forerunner 301 out to the track today for my first little run with it. Well, it still has accuracy problems on the track, like I noted before, and it measured the distance via GPS about 11% longer than I calculate it from track laps. That's okay, counting laps isn't so very hard. It has my heart rate zones wrong too, but I can just adjust them in the program online.
It did catch the three times that I had to walk briefly due to a crampy gut. Ugh. Oh well, that's my eighth timed 5K run of the year, instead of the five-miler that I had hoped to complete after two consecutive rest days.
Note that it takes me over half a mile for my heart rate to get up to steady state. No wonder those first couple of laps always feel like crap!!