The mode participation in compulsory school sports and exercise was twice a week(n 831) compared with less than once a week(n 68s) for noncompulsory sports(Figure 1).
Participation in compulsory sport was significantly associated with breast size(×= 16.160, p=0.01, Cramer's v.121), there was a significantly greater number of larger-breasted girls undertaking less than one compulsory session per week compared with smaller-breasted girls.
Interestingly, there was no association between breast size and participation in compulsory sport. Mode sports participation rates changed across school year reaching lower levels in years 10 and 11 for compulsory sport and 9, 10, and 11 for noncompulsory sport.
Chi-squared analysis revealed no association between breast size and participation rates across any school year.