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Pace intermittently spiking high while running

I noticed this about 4 days ago, while starting a run - about .5 miles in, my average pace was displaying something that looked accurate, however my actual pace was showing 0. As I continued to run, it caught up. However, throughout my run it would periodically jump to a high 10 minute actual pace and slowly speed up to what I was currently running which was high 8's. I assumed it was poor satellite connection and told myself I would check it out next run. 

The same thing has happened over the course of the next 4 runs. Today, I was half way through, I did not pause nor slow down as I was running on a flat road. I was averaging 8:40 pace and looked at my watch to check actual pace because I felt I was speeding up and a bit breathless. When I looked, it show 10:50 for my actual pace. Then I watched it over the course of the next mile and it would fluctuate between high 10's and high 9's all while I was actively speeding up to test it. I was roughly at mile 6 of a 10 mile run. It was very humid and I had waited about 30 seconds after the satellites were found to start my run as I have been hyper aware of this issue happening. 

I can't tell if it is impacting my average pace or not. I have seen it fluctuate and go up during this time and not. 

My watch just updated to the brand new software update, 14.1 today and I am curious if this will fix it, but wanted to see if others have noticed this?

  • My watch shows actual pace very very badly. The only reasonable thing is to add field with average pace... of course in the woods or with heavy clouds is even worse. But... average pace is OK. It shoud have not actuall pace but '5s average pace' - that would smoothen what we get.

    The same with fr255. 

    It is very bad for people starting to run. I train wih newbe and she cant rely on the garmin watch pace... suunto 10 years ago was waaaay better.

    I dont know how it is with multiband gps in new fr265? Edge 540 show speed with 0.1 km/h accuracy...