Zumba, yoga or pilates should be offered to girls as early as primary school as a way to get them exercising and combat obesity.
Australian health experts have said a greater diversity of exercise routines would help girls, who continue to be less active than boys.
However, New Zealand experts have largely dismissed the idea.
The New South Wales Schools Physical Activity and Nutrition Survey report, released this week, surveyed more than 8000 primary and secondary students and found 22.8 per cent were overweight or obese.
Fifty-two per cent of boys reached the recommended level of physical activity, compared with 41 per cent of girls.