This exercise is suggested for all specially the seniors and to be senior soon, to build muscle strength in the arms and shoulders. It seems so easy; you might want to pass it on. Do it just 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. Then 50-lb. potatoes sacks, and then eventually try to get to where you can lift a 100-lb. potato sack in each hand and hold your arms straight for a full minute. Once you feel confident at that level, put a potato in each of the sacks.