By all rights, Fletcher Hall should not be happy.At 76, the retired trade association manager has endured three heart attacks and eight heart bypass operations. He's had four stents and a balloon inserted in his heart. He has diabetes, glaucoma, osteoarthritis in both knees and diabetic neuropathy in both legs. He can't drive. He can't travel much. He can't see very well. And his heart condition severely limits his ability to exercise. On a good day, he can walk about 10 yards before [...]
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