How to increase "low aerobic" load?

I had the same "problem" as you, I think it is because it's the way it's meant to work : hills and medium intensity intervals will account for high aerobic because it is what your session will benefit most (even if you have recovery in between intervals, they will not "really" benefit low aerobic load as your body focuses on higher effort during the exercice). In order to get low aerobic load you must really focus on training slowly during the whole workout, without pulling too hard on your resources :) The good thing I also found is, it's quite hard and frustrating in the beginning but it gets easier with time - and you can really see your fitness improve at a certain heart rate if you compare pace or speed !

 I did this ride two weeks ago with even steeper climbs on the way home.

This was an 1:41 hour ride with an average HR of 129bpm and a training load of 169.

This ride was considered Low Aerobic however. 

It's really confusing why this harder ride was considered "Low Aerobic" while todays ride (what was more Zone 2 centric) is considered High Aerobic.

Could this be a beta firmware issue ? Two weeks ago the watch was von 9.0, now on Beta 9.94. 

I would really like to know how this is determined and why it is so different for me. Like I said, for me it is the opposite, I can hardly get high aerobic load. Look for example this ride (most in zone 3) is giving me low aerobic load only:

How did you setup your HR zones ?

Mine is  "% of Heartrate reserve" and my VO2max is 48.

Could this make such a huge difference in to what zone a training load is awarded to ? I wish somebody could give us some insights about this blackbox training load focus and provide some guidance how to train in the right zone to be awarded with low aerobic load. The only reliable method I found so far is doing workouts on my bowflex and keep the HR very constant in Zone 2. However, living in the mountains it's almost impossible to do an outdoor training and keep the HR constantly in a range of +/- 5 beats.

just forget the VO2Max here, zone2 is the solid foundation!

there is no heart rate specific for VO2MAX...but usually is a workout very hard for period of time!

try look at the Lactate Threshold, you can have a NUMBER to follow!

Our heart doesn't know if we are running or walking, so if you need to walk to lower your heart rate, then walk!

Run slower. You are probably less aerobically fit than you think. Sorry. When doing my easy runs, I try to follow the MAF numbers/guidelines. I have the opposite shortage as you, I have too many Low Aerobic "points" and not enough of either High Aerobic or Anaerobic. 

Running slower may genuinely be very difficult to do. If it is, trying out some run/walk/run methods may be a better bet. Basically run until your HR goes past your low aerobic zone (go with either top end of your Zone 2 or go look up your MAF-HR), then walk until your HR drops down sufficiently, then repeat. 

9967743 said:

I would really like to know how this is determined and why it is so different for me. Like I said, for me it is the opposite, I can hardly get high aerobic load. Look for example this ride (most in zone 3) is giving me low aerobic load only:

How this training is detected by the watch? Is it TEMPO, Threshold and what is the Aerobic Training Effect value of this ride?

I am having the same problem. I have custom HR zones based on functional threshold Testing and set per the triathletes training bible. I just completed a 1.5 hour ride where 94% of the ride was zone 1 or 2.  Garmin shows the primary benefit as “tempo”. 

Does Garmin use custom HR zones for these calculations?  The triathletes training bible doesn’t set zones on 10% increments, so I wonder if it’s using the “standard” zone percentages calculated off the max HR. Anyone know?