This exercise is for seniors to build muscle strength in the arms and shoulders. Please don"t over do it - please limit it to just three time a week.
Begin by standing on a comfortable surface, where you have plenty of room at each side. With a 2 kg. potato bag in each hand, extend your arms straight out from your sides, then 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 5kg. potato bags. Then 10 kg. potato bags and, eventually, try to get to where you can lift a 50 kg. potato bag in each and hold your arms straight for more than a full minute.
After you feel confident at that level, put a potato in each of the bags; but be careful.