The athlete received a series of increasingly immodest photos from a woman via mobile phone, newspaper Dagbladet reports.
"Unfortunately he did something stupid. He answered with a similar photo. Not exactly a bright move," the athlete's trainer told the newspaper.
The trouble started when the woman suddenly said she was offended by the picture and reportedly contacted various media offering to sell the nude photo of the Olympic star.
"Our man was clearly affected, and found the situation very difficult. The incident probably reduced his Olympic performances, because the strain became immense," the trainer said.
The man's trainer said that they had never offered the woman money to keep the picture private.
"It was never an option. We just told her what the consequences would be if the photo became public," he said.
