[andmarios]

Being able to walk for 3-5km, maybe with a little incline, play with your kids, do a few chores, is important. A 25-30 minute jog every now and then or 10-15 minutes of light cardio/HIIT mixup can help with this, no need to go full endurance.

Furthermore a more proper fitness regime will fix your posture and improve your quality of life immensely. Things like a flight of stairs, getting in and out of the car, carrying a couple bags of groceries, or just getting up from the floor will become much easier. Again, not going into hours of training, but to 15-30 minutes a few times per week. Your kids can watch. :)

I don't challenge the research results. Just saying that there are more upsides than just cardiometabolic health, as someone who has seen this first-hand, going from couch potato to a little more active lifestyle.

[feet]

Training specificity is a thing. Why would endurance training fix your posture?

[jeltz]

Long distance running certainly puts a load on your back and your shoulders. I have been sore there the day after some really long runs, so I can see how it improves posture. Also you need to focus on proper posture when doing long runs.

Is it the most time efficient way to fix posture? For sue not, but it should work.