World📡 New York TimesBy Victor MatherJun 29, 2026👁 12 views

Les Mills, Olympian Who Founded Fitness Chain, Dies at 91

Les Mills, Whose Gyms Helped Popularize Aerobics, Dies at 91

A New Zealand Olympian, he started a small gym in Auckland that grew into a worldwide chain.

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  • Les Mills in 2018. “He saw the gym as a place where people could come and find refuge,” his son, Phillip, said.Credit...Jason Oxenham/The New Zealand Herald, via Getty Images

    By Victor Mather

    Published June 29, 2026Updated July 21, 2026

    Les Mills, an Olympian for New Zealand who founded and gave his name to a family-owned fitness empire that helped popularize aerobics, died on Monday. He was 91.

    Les Mills International, the company he founded, announced the death but provided no further details.

    The company made its name by promoting vigorous group aerobics sessions set to upbeat music, helping to popularize aerobics in New Zealand, and then around the world.

    Leslie Roy Mills was born Nov. 1, 1934, in Auckland, New Zealand. His father, who owned butcher shops, died when Les was 11.

    Mr. Mills competed in shot put and discus and participated in four Olympic Games from 1960 to 1972. His best finish was seventh in the shot put in 1964. He was chosen to carry the New Zealand flag at opening ceremonies in 1960 and 1972. He won the discus competition at the 1966 Commonwealth Games.

    In an era when Olympic sports were strictly amateur, he opened a shoe shop in New Zealand at age 19 with his wife, Colleen, also a track athlete. In the middle of his athletics career, he spent two years competing for the University of Southern California and was inspired by the emerging gym culture in that part of the United States.

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    Mr. Mills competing in the shot put at the 1964 Olympics in Tokyo.Credit...Keystone/Hulton Archive, via Getty Images

    He founded his first gym in 1968 in Auckland. It was so small that it had just one changing area and bathroom, so it was open to men and women on alternate days, the company said.

    As the gym business grew into Les Mills World of Fitness, it began pioneering aerobics with group classes set to peppy music that were given names like BodyPump and BodyAttack.

    Mr. Mills’s son, Phillip, turned Les Mills New Zealand into Les Mills International, and it has since expanded to 100 countries.

    His wife, Colleen, died in 2005. Mr. Mills is survived by his son and a daughter, Donna; four grandchildren; and several great-grandchildren. Both of his children competed in track and field at the Commonwealth Games.

    After his athletics career, Mr. Mills became the national sports director in Papua New Guinea from 1974 to 1976, leading the country to its first Olympics. He was also a coach for the New Zealand track team and coached Beatrice Faumuina to the 1997 world discus title.

    Mr. Mills was elected mayor of Auckland City, serving from 1990 to 1998. He was named a member of the Order of the British Empire in 1973 and Companion of the New Zealand Order of Merit in 2002.

    “I think he saw the gym as a place where people could come and find refuge, could improve their lives and get healthier and find community and all those nice things,” Phillip Mills told RNZ, a New Zealand public broadcaster. “And I think he would have liked to have seen a little bit more of that in the world today.”

    Victor Mather, who has been a reporter and editor at The Times for 25 years, covers sports and breaking news.

    A version of this article appears in print on  , Section A, Page 34 of the New York edition with the headline: Les Mills, 91, Whose Gyms Helped Popularize Aerobics. Order Reprints | Today’s Paper | SubscribeRead 10 comments

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