I've been backpacking since the 60s, slowed down with the arrival of kids, then several years ago my back went out on me. I figured my backpacking days were over.
Recently I came across ultralight backpacking, and saw a glimmer of hope. I picked up a few items, and got my total weight down to 28 lbs (I don't think I've ever carried a pack under 50 lbs previously).
This past week, my daughter and I did an easy 4 miles in, 4 miles out overnight, just to see if my back could take it...
And my back is fine! Now my legs complained a lot about not having done this for awhile, but no problems at all with the back!
I can't tell you how good it felt to be in the mountains again!