A man with brittle bones disease is in a critical condition in hospital after falling from his wheelchair during a half marathon.
Samuel Gibson, 39, suffered a head injury while competing in the event in Hawke's Bay yesterday, according to a Facebook post.
Mr Gibson was featured in a Sunday documentary program recently, which told of how he had led a full and active life and had designed a buggy that gave him and others around the world mobility.
He was born with osteogenesis imperfecta, a genetic disorder that makes bones brittle and prone to fracture. There is no cure, although some treatments are used to strengthen bones.
Mr Gibson, who gave a TEDxAuckland talk recently, has been helping to raise money for Ryuki, a New Zealand child who suffers from the same disorder.
A Facebook page supporting Ryuki has a post "Please pray for Samuel. He had an accident yesterday and is on his life support now. Please come back and show us your unbreakable spirit".
There are hundreds of messages of support for Mr Gibson on his Facebook page, including from competitors in the Hawke's Bay event who were inspired by him.
Mr Gibson has been training for the 300km Alps to Ocean Trail journey in the South Island later this year.
He was in a critical condition in Hawke's Bay Fallen Soldiers' Memorial Hospital today, a spokesman said.