When Dannevirke's Ngamihi Stephenson told her husband she was taking on the 100km impact swim challenge at AMP Wai Splash, he just shook his head in disbelief.
"He said, 'you can't do that'," she said. "I told him, watch me."
Along with 17 other entrants in the challenge, Mrs Stephenson had eight weeks to complete her 100km, but last Friday she was a triumphant winner of the event, finishing her last lap on day 28.
"My husband doesn't say much now," she said. "But he did suggest I do an extra 50km."
The 100km impact incentive programme offered participants rewards for every 10km and they could choose to swim, run, walk, or dog paddle, Annette Lilo of AMP Wai Splash said.