This is for older people. Younger people may try it at their own risk.
This is working well for me.
For those of us getting along in years, here is a little secret for building
your arm and shoulder muscles. You might want to adopt this regimen.
Three days a week works well.
Begin by standing straight, 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 return your arms to
your sides and relax.
After a few weeks, move up to 10-LB. potato sacks, and then 50-LB.
potato sacks, and eventually try to get to where you can lift a 100-LB.
potato sack in each hand and hold your arms straight out for more than
a full minute.
After you feel confident at that level, start putting a couple of potatoes
in each of the sacks, but be careful not to overdo it.
You don't stop laughing because you grow old, you grow old because you stopped laughing.