When Josh Collins is on dry land, he feels like he's at sea. Walls move, as if they are rolling in the waves. Floors tilt, as if they are the deck of boat. During seven deployments to Bosnia, Afghanistan and Iraq, Collins, a former U.S. Army Delta Force captain, sustained injuries to his brain, spine, inner ear and eyes that cause chronic balance and vision problems. When Collins was undergoing therapy two years ago, his wife bought him a paddleboard. The first time he tried it, he got his equilibrium back. He discovered that when he is on the water, he feels like he's on dry land. "My world is always shifting, like I'm a sailor," he said. "But when I'm on the board,...
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