Professor addicted to blade push-ups
A university professor says he has become addicted to doing press-ups on upturned chopping knives.
Xie Guanghai, 57, a physics professor in Luoyang, central China's Henan Province, claims he does about 4,000 push-ups a day.
He said it took him four years to master his technique of doing press-ups on knives fixed into place on a wooden board.
Xie has developed thick calluses on his palms which allow him to do his press-ups without cutting his hands.
"Along with the growing of my interest in this unusual exercise, the calluses have grown thicker and thicker," he said.
Xie already holds two world records for conventional press-ups, including one for doing 6,012 in a row, and now plans to apply for a place in the record books for 'blade push-ups'.
"Four years ago I started to try these blade push-ups after watching a TV programme where a folk artist climbed up a ladder made of blades," he explained.
"Hopefully I can achieve the record of doing the most push-ups on blades."