How to disable the Fitness Age changed notification?

I haven't seen a way to disable those. They'll probably lessen as you wear the watch. It's likely getting used to your stats. 

Don't complain. Mine went down from 68 to 62. 5 and I'm gunning for the target of 58. Sadly l'd love it to say the same as yours!

This is still happening. It's so damn annoying! It even woke me up early in the morning one time. This is was supposed to help me sleep better!!!

This just happened again. Apparently I'm 6 years younger now. What on earth does that even mean???

A couple of thoughts

1. The Fitness Age estimation is explained here - https://www.garmin.com/en-US/garmin-technology/health-science/fitness-age/

2. Do Not Disturb will prevent you from getting alerts and notifications (you can configure DND to automatically turn on during your sleep hours) - https://www8.garmin.com/manuals/webhelp/GUID-9CC4A873-E034-4A06-B2E0-636DCFE760EE/EN-US/GUID-FE220A09-D725-4947-9BF7-FA3D244BC661.html

3. I havent been able to test this thoroughly yet, however, you can also try changing disabling the Goals setting on your device

     Settings > Notifications and alerts > Health and wellness > Goals

4 Scott is correct that the fitness age notifications should lessen over time