I’ve had my Garmin 945 for almost a year, and despite a few teething problems I’m incredibly happy with it. I also suspect that I’m not using half of the clever functions that it can do, although I do like to have a look at my race predictions.
My 5k prediction has always been less than 20 minutes (not by much). At the weekend I ran Penrith parkrun (read about it here) and to use an old phrase, I gave it some biscuits. I managed my third best age graded result, and my best age graded result since 2018. My heart rate was up in zone 5 for nearly all of it, with a maximum of 182bpm. My finishing time was 20:24, only a little slower than my Garmin race predictor has always stated.
But then a funny thing happened, on Sunday my predicted 5km race time was slower than I had done the day before. Currently it is at 20:19. Maybe my Garmin has analysed my performance at Penrith, coupled with my heart rate and has decided that possibly just over 20 minutes is my top speed.
Hopefully if I start doing a bit of speed work, and lose a little timber, before the end of the summer I can manage a sub 20 minute 5km. Of course, the race prediction doesn’t take into account elevation, weather, or if you’re feeling a little tired and should have rested. However, as the race predictions change on a daily basis, it is still amazingly accurate.