OSLO—Norwegian hurdler Karsten Warholm is not against innovation in sports but feels the new carbon-technology shoes are hurting athletes’ credibility, the men’s 400 meters hurdles champion at the Tokyo Olympics told Reuters. Karsten Warholm shaved off his own world record by .76 of a second—a massive margin in a one-lap race—to hold off American Rai Benjamin to win in Tokyo in what would be remembered as one of the all-time great Olympic races. Benjamin took silver in 46.17, also half a second inside Warholm’s previous record of 46.70 while Brazilian Alison dos Santos took bronze in 46.72 as six of the first seven finishers set national or continental records. Following his victory Warholm spoke out to criticize the thick-soled shoes of Benjamin, despite also wearing spikes with a carbon plate that unquestionably improves performance. “What I said was misunderstood in some way, because I had one comment about it after …