How to increase my vo2 max ?

Google is amazing. Look what I found....

https://www.firstbeat.com/en/blog/why-isnt-my-vo2max-increasing/

https://www.healthline.com/health/exercise-fitness/how-to-improve-vo2-max

have you looked at your training status to see what it suggests as to whether you need to do more Anaerobic, high aerobic and or low aerobic.

Also what sort of activities are you doing, as i have heard that if you throw walking/hiking into the mix it can affect your VO2 max score.

and check out how you can fix it using the suggested links by eezytiger.

personally focus much more on my training status etc than my VO2 max.

Interval training.

For me, I just run more. And if you want the number to go up, just run hard at the beginning of the run, then in the mid and end of the run, push the fastest pace you can without blowing up or hurting yourself. haha

Eat Less ... as VO2Max is 1/Kg 

I'm finding that long runs in zone 2 have been steadily but slowly increasing my V02 max. 

Also I only do V02 max runs 1 or 2 times a week. The other running days I use trail run with the V02 max setting turned off. That way I dont worry about my pace or heart rate, I just go for it. 

Try Norwegian intervals. 10 minutes warmup, then 4 minutes fast running at around 90% of max hr, then 3 minutes active rest, repeat 3 more times. Then cooldown.

Your VO2 max will never increase unless you exceed your maximum heart rate. Exercising below the VO2max HR only increases heart volume and oxygen circulation, but not CONSUMPTION.

If you increase the gas tank, the car will not go faster.

Andrew said:

I'm finding that long runs in zone 2 have been steadily but slowly increasing my V02 max. 

They increase the number that Garmin is showing. And that's it!

How can you exceed your maximum heart rate? 

Heart rate where VO2max detected  It's about +10-15% from LTHR 

It is possible to determine the pulse at which the maximum oxygen consumption is reached only with a gas analyzer.