A few weeks back I laid a patio - no problem
I built a small wall in the garden - no problem
I built a dry stone wall in the garden - no problem
I put in five fence posts - no problem
Today, I go to the shops, but one bag of lettuce leaves, one cucumber, some tomatoes, and mange tout. As I got back into the car, I felt something go in my back. Four miles later at home I could hardly move.

I've been on pain killers all day, hurts like ****