Got something similar chucking the ball for the dog 25 years ago. And again at Xmas carol singing in freezing weather.
Quack told me to get up and move around. It got better. A slipped disc I think.
Very little trouble since.
But now I gets an arthritc foot. For one who likes to ride on the pedals, this isnt good. .
When ya get older, life gets better and it also gets worse. Bit like marriage really ha ha. . wonder whats next??? !