When I went to the doctor today for my yearly checkup, they said I had gained 3/4 of an inch in height. I’m 73 years old so it’s a little late for a growth spurt.
My only explanation is that they made me back up against the wall and back my heels against the wall, and I was standing straighter than normal.
So if your parents ever said something like “Stand up straight and stop slouching“ I think they might’ve been on to something.