A group of muscles hardly ever addressed are your hands & forearms.
Strong hands help carry suitcases & boxes & also help you open those pesky jars the machines have screwed on too tight.
I started using a tennis ball & squeezed it during TV time, 5 minutes for each hand. The next day I was amazed how the muscles in my hands & forearms ached, so I skipped a couple of days & did the exercise for a 2nd time.
I was amazed how quick my hands and forearms grew stronger. In 6 weeks I increased the
time to 10 minutes. 4 weeks later I was doing 15 minutes & then I was doing 20 minutes.
I've switched to a handball (more difficult to squeeze) & I'm up to 15 minutes. 1 benefit is now I'm able to open any jar my DW hands me & my sons are amazed how hard it is to beat a 65 y/o man arm wrestling.