Hi, I'm 55 years old and in January I started working on my core and weight lifting to get my upper body in better shape to match my biker legs.
I went from bench pressing 5 pounds in each hand to 20 pounds.
I went from curling 2 pound weights to 15 pounds. After being on the planet
for 55 years I can now finally do PUSHUPS. If you are middle-aged, (whatever that is) you still have a great capacity for improvement physically!!!

so why isn't anything going to change much?