Advertisement Continue reading the main story“That’s a massive difference,” he added. That year, Spira Footwear said its running shoes were banned because of spring technology that the federation deemed improper. Advertisement Continue reading the main storyBut the federation’s rules have become more ambiguous since Pistorius prevailed in the Court of Arbitration for Sport. The I.A.A.F.’s Rule 143 now says that shoes “must not be constructed so as to give an athlete any unfair additional assistance, including by the incorporation of any technology which will give the wearer any unfair advantage.”What constitutes an unfair advantage? Advertisement Continue reading the main story“We’re not living in medieval times,” Hermens said.

Source: New York Times March 08, 2017 10:00 UTC