This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Race Prediction and Training effect and VO2Max valculation wrong?!

Hi,

I have been using the 945 for over a month now and I noticed 2 issues and would like to know if anybody experienced similar problems. The first one is that my race prediction is just pain wrong! I have not done a race yet but I have done faster training sessions and the watch just does not adapt. For example my current race prediction is at 21min für 5k and 44:39min for 10k and i recently ran under 20min in training for the 5k and under 42min for 10k. As well as that I have a really weird Lactate threshold tempo (5:19). The heart rate seems fine (180bpm) put the tempo is way off. VO2max prediction is always around 50-52. Furthermore sometimes get the training label Tempo for runs where my heartrate is only in the Reg./GA1 zones. Is anyone experiencing similar issues and knows how to resolve them? The phone support could not help me, so i am really happy if anyone knows a solution to my problem. Thanks!

0 CloggyAbroad over 5 years ago

What training effect did the watch give you for your sub-20 5k training run?

0 felix1504tri over 5 years ago in reply to CloggyAbroad

VO2Max. The watch seems to label the harder efforts right but when I train at low intensity (low hr) it still thinks it is a hard effort

0 CloggyAbroad over 5 years ago in reply to felix1504tri

What were the actual numbers it came up with for training effect?

0 felix1504tri over 5 years ago in reply to CloggyAbroad

Aerob 4,0 Anerob 2,6

0 Dr Phil over 5 years ago

What are your heart rate zones? How were these determined?

0 Heidstocker over 5 years ago

For me it works pretty good with the new FirstBeat based prediction. Way more realistic than the old VO2max lookup-table and it also changed the predictions during the last weeks although the VO2max itself was stable. The algorithm gave me faster times for HM and M as soon as it detected that I'm regularly doing long runs.

Two points come to mind regarding your problem:

Is your HR-max correct (in the watch)? When you say the 945 detected "tempo run" although you were running in GA1, it sounds a bit like this seems to be wrong. (I propose to check that right on the watch within the settings-menu)

Another point could be: Does your HR graph look ok? It could contain a lot of high spikes due to bad HR readings.

If nothing helps, I'd reset the watch and let it start from scratch again. Maybe something else is messed up.

0 kitenski over 5 years ago

check what your heart rate zones are, both on the watch and on the app.

0 9578742 over 5 years ago in reply to Heidstocker

Reset doesn't work..after the first sync the vo2max will be updated

0 Former Member over 5 years ago in reply to 9578742

Same here. I finished my Marathon in 2:47. My watch predicts me a 3:07. That is far away

0 caferey over 5 years ago in reply to Former Member

It could be your max HR is wrong. Increase it by 5 beats and you should see much more realistic race times, your VO2 max will probably increase. I haven’t run a marathon for years but the projected time is realistic. The HM projected time is around 15 seconds to about 90 seconds range of my current HM (depends on how many long runs I do a week) and about 10-20 second range for my 10K.