the HR doesn't seem to match the paces at all. she gets faster and the heartrate goes down. I don't know why?
1km warmup 6:06 (6 minutes 6 seconds) average HR 185
2km 5:44 181
3km 5:23 196
4km 5:20 202
5km 5:20 201
6km 5:24 192
7km 5:16 174
8km 5:14 173
9km 5:11 166
10km 5:29 158
11km cooldown 7:19 162
Probably just the hr data being off for one reason or another. Data from watches can still be pretty unreliable.
I bought my first watch with a hr monitor a couple months ago (a new garmin 55) and am kinda amazed by how inaccurate it is. I wasn't expecting it to be perfect or anything, but there's barely any consistency for what it shows from day to day.
For example, I did a 6k easy run yesterday at 4:59/k pace and it showed an average hr of 178. Today I did 8k, with the middle 4k at 3:26 pace and the warm up/cooldown at 5:00 and had an average over the run of 166. Both of these were on the same flat river trail...