School principals and health experts are concerned about the number of teenage girls who drop out of sport and physical education.
In Britain a large survey found only 12 per cent of girls were reaching the standard level of fitness by age 14 - half the rate for boys, which was also low at 24 per cent.
Just over half of girls said negative experiences of sport and PE lessons had put them off exercise at school.
Government agency Sport NZ said yesterday that no such national survey results were available on New Zealand teenagers, but reports had consistently indicated girls were dropping out of sport and other physical activities more than boys.
PE classes are compulsory until the end of Year 10, but PE performance, offered from Year 11, is optional.