My Grandpa, the Blacksmith!

* from the fishing net. My grandfather worked in a blacksmith shop when he was a boy, and he  used to tell me, when I was a little boy myself, how he had toughened  himself up so he could stand the rigors of blacksmithing. One story was how he had developed his arm and shoulder muscles. He  said he would stand outside behind the house and, with a 5 pound  potato sack in each hand, extend his arms straight out from his sides  and hold them there as long as he could. After awhile he tried 10 pound potato sacks, then 50 pound potato  sacks and finally he got to where he could lift a 100 pound potato  sack in each hand and hold his arms straight out for more than a full minute! Next, he started putting potatoes in the sacks.