David Massey's motivation to help people get fit is to help them transform their lives.
The Rotorua police custody officer said he was "blushing" at the news he had been nominated for a Pride of New Zealand award.
Mr Massey was nominated in the Community Spirit category.
The Rotorua Group Challenge has grown from a handful of mums to more than 200 people. It is a 12-week challenge with a $20 registration and two sessions a week. Most of the money is gifted to the first and second placed registrants with 20 per cent for administration, such as printing handouts. There is a koha bucket at each session, but Mr Massey's nominee said this money was put towards spot prizes.
Mr Massey, who recently ran the Christchurch Marathon, said he was surprised to be nominated.