This one that Dave Brown emailed to us is pretty funny.
Getting old ain't for sissies...
I came across this exercise suggested for seniors, to build muscle strength in the arms and shoulders. It's so easy, I thought I'd pass it on.
The article suggested doing it three days a week. Begin by standing on a comfortable surface, where you have plenty of room at each side. With a 5-LB potato sack in each hand, extend your arms straight out from your sides, and hold them there as long as you can. Try to reach a full minute, then relax.
Each day, you'll find that you can hold this position for just a bit longer.
After a couple of weeks, move up to 10-lb potato sacks, then to 50-lb potato sacks.
Eventually try to get to where you can lift a 100-lb potato sack in each hand and hold your arms straight for more than a full minute.
Once you feel confident at that level, put a potato in each of the sacks.