In the early days, the fitness industry was "basic" with the majority of men into body-building and strength, and the women into Step Reebok and Tai Bo, he said. Nowawdays, there was much more crossover and at least half the women were lifting weights. He brought the first treadmill to Rotorua and remembers gym users queuing up to try out the new technology.
Mr Gardiner continued to study and, realising New Zealand was heading for an obesity epidemic, in 1995 rebranded as Gold's Health & Fitness.
"My business strategies were no longer prioritising body sculpting and body beautiful, but became focused more on the health benefits of exercise and making healthy lifestyle choices," he said.
New activities included developing heart rehab programmes with the NZ Heart Foundation.
Richard Beddie, chief executive of the Exercise Association of NZ, said the exercise industry had expanded phenomenally over the past two years.
"The growth has been in specialty areas - yoga, personal training, spin studios - there is growth in new directions. It mirrors international trends. Awareness of the need for exercise is at a tipping point."