I want to agree. But I turned forty a few years ago, and I'm in the same boat as the top post. Either using a dining chair or a workout bench as my sitting option.

That is, I can't lean on youth. But I also don't have near the pains mentioned on so many message boards.

Now, do I have trouble staying focused? Oh yeah. Staying motivated? You bet. Haven't exactly been a pleasant year. But my seating seems to be the least impactful thing going on right now. :(