what headphones work for sports and activities?

Can't compare to others, but the Etymotics 6s sound just fine when I'm in the gym and they provide about 15 dB of isolation as well.

I've got the Etymotic ER-4P which are great for isolating outside noise. The downside is the cord is very microphonic, you'll hear it rubbing against your clothing when you move. Not sure I would recommend them for what you want to use them for.

I have never cared much for the type of headphones that fit inside your ear. For exercise walking or stationary bike/treadmill use try either:

1. Sennheiser PX 100 ($40 USD) ... a foldable, conventional open air design or
2. Koss KSC 50 ($20 USD) ... a sport clip-on design.

Both headphones are very comfortable and pretty nice sounding for sports use.

Regards, Rich

No matter how trite it may sound, but it seems to me that the best headphones are the AirPods Pro. They are very comfortable. When you do something like a workout, they do not fly off. I used to use wired ones, but when I started to go through programs https://bestbodyworkout.com/1000-calorie-workout/ , it became weird