When my back got jacked up from a work accident i switched over to a 380 in a rear pocket holster and (hopefully) have eliminated all of these issues. I will use my glocks again in winter, but I LOVE the ability to put my 380 in an "uncle george" in my pocket everyday, regardless of what I wear or where i go. Its great.
I do some of that with my cell phone. And since both of my knees are "shot" (no pun intended) I walk that way. But the rest is pretty true. That's why I opted to carry smaller 9mm and .380 hand guns with holsters that work.