Holger Welsch, foreground, does a trick on a slackline. Welsch, an engineer from Germany, says he finds the sport to be a stress-reliever. “The moment I’m on the slackline, I’m so focused on what I’m doing, all stress relieves because there’s nothing left in my brain,” he says.
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Return to Health (Ringo H.W. Chiu / For The Times)