For My Running Friends Who Love (and I do mean LOVE) Their Garmins

Humorous? Hopefully. Disturbing? Most likely.

Speed Work...Finally...and a Garmin HR Monitor Issue

Got out to the Centennial Trail in Snohomish and ran a total of five miles, which included a 1 mile warmup, followed by 4x .5 mile fast, .5 mile slow. The fast half mile segments were:

3:24
3:23
3:14
3:25

I tried to keep them at about 5k race pace. Legs felt good, but chest & lungs are still a mess.

Okay, this has been irking me since I got my Garmin Forerunner 305 about a month ago. The HR monitor doesn't seem to settle into an "accurate" reading until about 2-3 miles into the run. Even when I'm running very slowly and KNOW that my HR is likely in the 130-135 range, it immediately jumps up to about 165 and holds there until that 2-3 mile mark, when it suddenly drops down to where it should be. I can remember ONE TIME when it seemed to read correctly the entire run. Does this happen to anyone else? If so, is there a way to get it to work properly? It's frustrating and, obviously, not very helpful.
Thanks!