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 outside behind the house, 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, if you can reach a full minute, relax. You may start feeling the exercise work with a little pain.
After a few weeks, move up to 10-LB. potato sacks After you have master the 10lb sacks move up to the 50-LB.
potato sacks. You should start feeling stronger. Then move up to the 100 lb potato sack in each hand and hold your arms straight for more than a full minute.
Next, start adding a couple of potatoes in each of the sacks, but be careful not to overdo it at this level.