Is a 12 min mile jogging or walking?

Well ... if he's walking really fast, then he's walking those 12 min miles. If he's jogging really slow and easy, then he's jogging those 12 min miles.

Also, you answered your own question there, OP

Wearing a Garmin, try walking without lifting for three miles at 12 minute mile pace. I found it surprisingly difficult to maintain faster than 13 minute miles. If you are a race walker then fair enough.

That would be a fairly uncomfortable 5mph walk but a pretty slow shuffle for a run. If I'm still running at that age, I could see that being on the slow end of my recovery pace.

You could "run" up a steep mountain at 20 minute miles and maybe use a similar effort to walk up it at 20 minute miles. They would look way different.

I have a bum knee and am 30ish pounds overweight. I run around 20 min. for a 5k right now...and there are days where I go close to 12 min. miles. It's not walking, but it's definitely a slow pace. As you get older and slower, you realize that the effort it takes to go at the paces you used to think was ridiculously slow still requires effort.

Correct. Walk/run isn't determine by speed, but the stride, specifically whether both feet touch the ground at the same time (walking) or never do (jogging/running).

While 12:00 miles would be slow torture for me, for a 68 year old it may be pretty good, considering many 68 year olds are in too severe shape to exercise at all. Others may be physically able, but have given up.

Regardless, let him brag about his 12:00 miles. Who cares.

...and you get to a certain age where don't care if the pace you are running is considered slow by others...

It's wogging.

If you plug it into a treadmill you will see it's that awkward speed between a fast walk and slow jog. It's not comfortable no matter how you do it.

Set the treadmill at a decent grade, then try it.

Get back to us when you are 68.

You are an idiot. If a 500 pound man did 12 minute miles what would you call it? It would not be walking UNLESS maybe he is a racewalker. There are racewalkers who might walk faster than you jog. If a 68 year old is doing 12 minute miles he can damn well call it whatever the fucc he wants. Good for him.

Race walkers can do sub 6 min miles. Probably faster than you run.

12 min miles for a 68 year old is actually pretty good. I am 10 years younger and I am just happy to be around 11 min miles, if possible.

Straightshooter is probably just a young punk and I don't blame him for his lack of wisdom. Just today I admired some young college kids who blasted by me, shirtless.
All I can say is enjoy your speed while you can. In a few years most of you stopped running and are overweight with 35.

I am aware elite speed walker so-called walk faster than 7 minutes per mile (I have watched speed walkers on super slow motion, they are running). Faster than 14 minutes per mile is sprinting, running or jogging. Slower than 14 minutes per mile is walking.

To be fair the OP was not being overly condescending from what I could tell, and it is a legitimate question. I've thought the same myself. It's commonly accepted that average human's casual walking speed is around 3-4 mph (so 20-15 min mile pace). However as someone pointed out already the distinction between walking and running is not defined by the pace but whether or not your feet come off the ground. That is a much more objective definition that we can agree upon.

When I run/jog at my maffetone hr it's about a 12min mile.

There's people that jog your PR.

Is your PR running or walking?

Throw out the results of speed walkers. I've watched them on super slow motion. Most do not maintain contact with the ground. Speed walkers are just funny runners.

Yes, walking always has at least one foot on the ground while running always has at least one foot above ground.

But nobody cares about whether something qualifies as running or not, only whether it’s walking or not in walking races.