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I did the suggested sprint workout and got no aerobic points, why?

Suggested workout was 3 x 3 sets of 15 second sprints at 2:30/km I did them at 2:28/km and followed the workout as it guided me. I wore a Polar H10 Heart Rate Monitor.

Before this workout my aerobic training load was 242 and now it's 232, 10 points lower huh? I got no purple bar in the 7 day load it's blue.

Training effect was 3.0 aerobic | 2.1 Anerobic

Primary benefit: Base (it should say Sprint)

I also started each sprint 5 seconds earlier to make sure the GPS didn't lag behind.

0 MarinusvD over 3 years ago

This week i did a sprint training suggested by Garmin 10 times sprint for 10 sec. at the and the benifit was sprint !

How long are you using the 945 at this moment and did you set you Max Hf and lactate value on auto detect ?

For your info my rest time was 3 mins at certain HF level not walking like you did is see.

0 9386496 over 3 years ago in reply to MarinusvD

I did this workout 5th August a bit faster at 2:22/km and it got 2.3 anerobic primary benefit sprint I did the same as today walk/jog the 3 min rests to keep my heart rate in the zone (why should it even matter it should be the speed of the sprints that matter) and jogged the 5 min between sets.

I've been using 945 since October 2020. Also when I moved to Spain my v02 went from 68 to 60 in the course of 2 months because I went from 0m elevation a week to 2000m. If you run hills it doesn't know and thinks you're running slower with a higher heart rate.

0 e7andy over 3 years ago in reply to 9386496

9386496 said:
If you run hills it doesn't know and thinks you're running slower with a higher heart rate.

You should probably use the Trail running activity type when running hills. It will give a more accurate VO2 max.

You can also create a copy of the Running type and turn of VO2 max calculation for that if you don't want to log it as Trail running.

0 9386496 over 3 years ago in reply to e7andy

Hmmm nice even f the hills are on roads? I thought Trail Mode tries to account for rocky terrain not hills by different arm swing patterns.

If I turn off v02 doesn't that mess up training status that's the main reason I kept the watch over 935. Won't it stop suggested workouts?

0 e7andy over 3 years ago in reply to 9386496

That is why you should have two different Running activities. One with VO2 max activated where you run normal sized hills and one with VO2 max turned off where you run hills that will affect your running speed and heart rate too much (similar to when you do trail running). If you at least do two activites per week with an activity type that gives you a VO2 max value you should be ok.

Another way could be to use the trail running type to get correct VO2 max values, training load and training status and afterwards in Garmin Connect change it to Running to get correct statistics.

I don't know how VO2 max for trail running works, but trail running is not just rocky terrain like sky running or running off trail. On a hard and dry trail you can run as fast as on asphalt, but it is still trail running.
I don't think the arm swing patterns have any effect at all on the calculations of VO2 max. My guess is that it is more about how the watch will find representative values for your VO2 max values and the ascent/descent.