I spent a few hours last weekend helping a friend wet-sanding the hull of his sailboat.
Apart from getting uncomfortably cold when it started raining, I enjoyed the work very much in its own right - using my body, finding the movements that worked, bending to dip my sandpaper block in the bucket, up again, swish, swish, swish, down again, a dance, using my entire body.
Going there I expected to be tired and achy afterwards, but I wasn't. My knees were achy but they always are nowadays.
I am itching to do more.
I did however spill red paint on one of my favourite hats. Bah.