I'm told this works for you youngsters too!
EXERCISE FOR PEOPLE OVER 50
Begin by standing on a comfortable surface, where you have plenty of
room at each side.
With a 3 Kg potato bag 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, and 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 5 Kg potato bags.
Then try 25 Kg potato bags and then eventually try to get to where
you can lift a 50 Kg potato bag in each hand and hold your arms
straight for more than a full minute. (I'm at this level.)
After you feel confident at that level, put a potato in each bag.