Don Benedict played handball competitively for 30 years in the Pacific Northwest. To stay in shape, he ran 5 miles every other day. But decades of pounding the pavement took its toll. When Benedict was 57 years old, he ruptured a disc in his back. And then it happened again. He had three back surgeries, and the last one, he says, made things worse. “I found out that they compressed my spinal cord nerves so long that they went into (a condition) called arachnoiditis,” he said.