Old age strikes hard and unexpectedly

Yesterday morning I pulled a muscle. While turning in the bed. I was handicapped the whole day, unable to deal with children, carry my laptop, and look leftwards. I had trouble swallowing and lifting any weight.
Today it's better, but not ok. I just hope this is not old age, otherwise I'll start sharing Leopardi's viewpoint. Except of course he never was as old as I am now.