Cardio Fitness doesn't have Apple Watch as a data source

Now, I’m convinced you’re just a troll 😂

Because why exactly? Seems to me I was trying to help you actually.

Actually I was the one who told you to wear the watch continually and not just put it on for exercise. But hey, I'm just glad it's working for you!

Thank you, I followed your tip.

Ive had my watch for 2 years (4 series) yet I have no data source at all on Cardio fitness. I have ran everyday in Jan and Feb and still nothing. Any advice?

Thank you. I did see that. I’ve tried that approach multiple times with no positive resolution.

My man, sgmerly, is still trolling around this group, defending the indefensible, feeding on people's frustrations 😂

Let people vent, and chill out. Go get some vitamin D, bro 😂

Apparently, I am not allowed to respond to this so I will simply leave this as is and the community decide for themselves.

Cardio Fitness has my watch and scale as data sources!

Good to hear and glad I was able to help!

No indoor activity counts towards the cardio fitness calculation, only outdoor walks and runs.

One thing nobody seems to be mentioning is that it seems to take some days for the reading to show up. I have had two watch pairings and the first time it took seven days before I got a cardio fitness reading. The second time it took three days. My advice then would be to wait at least seven days before concluding the feature isn't working. Before that point, you will not see your watch as a data source because it doesn't appear until the first reading writes the data.

Here is how I ‘fixed’ the issue on my watch.

The heart rate grey-ed out- turn off Power Reserve on the watch.

cardio Fitness not showing watch as resource— turn on location service

— on the phone in the watch app click on privacy, then on Reset Fitness calibration

• now do Outside walk or run using walk/run App for about 15/20 min.

this fixed the issue for me

I talked to an excellent support person at Apple and here is the fix.

First, you have to do at least a 20 minute walk OR run. I know we all know that.

However, Apple made a change recently in the iOS. Now for it to record Vo2 Max you have to run for 20 minutes at 10 mph. I can’t do that. So, if you record your workout as a walk and actually run for at least 20 minutes it will record it.

I actually recorded it through MapMyRun and it worked fine.

Hope this helps and Merry Christmas.

I had same problem. I have Series 3 Watch and iPhone 11Pro Max, both updated to latest software. As someone else pointed out, you must initiate OUTDOOR walk or run WORKOUT via the watch “workout app” only. You must do 2 workouts- (I did 1 workout on a Monday and the other on a Thursday-in the same week) before it calibrated and updated the Cardio Fitness statistics in the HEART APP. Hope this makes sense and hope this helps!