Fred, thought this article would mean something to you.
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Strength Building for Seniors
For those of us getting along in years, here is a little secret for building your arm and shoulder muscles. Even our friends who are not yet seniors may find this regimen helpful. Three days a week works well.
Begin by standing outside behind the house and, with a 5 lb. potato sack in each hand, extend your arms straight out to your sides and hold them as long as you can.
After a few weeks, move up to 10 lb. potato sacks. After a while, move up again to a couple of 50 lb. sacks. Hang in there for a few more weeks and then take the final step and go to 100 lb. sacks. You will know when you have reached your goal of renewed strength and endurance when you are able to hold the 100 lb.sacks at arms length for a full minute.
Next, try putting some potatoes in the sacks.