Begin by standing on a comfortable surface, where you have plenty of room at each side.


With a 5-lb 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 10-lb potato bags.


Then try 50-lb potato bags and then eventually try to get to where you can lift a 100-lb potato bag in each hand and hold your arms straight for more than a full minute. (I'm at this level.)
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After you feel confident at that level, put a potato in each bag .