I came across this exercise suggested for older guys like me, to
build muscle strength in the arms and shoulders. It
seems so easy, so 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. Then50-lb.potato sacks, and eventually
try to get to where you can lift a100-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.