The purpose of the study was two-fold: (i) to investigate the relative exercise intensities of pre-adolescent children participating in competitive games and practices of basketball, badminton, netball and tennis. (ii) to examine physiological, anthropometric and strength profiles of pre-adolescent children from the above mentioned sporting groups, as well as a control group, (who were not involved in organised sporting activities) over a period of three months corresponding to a season's participation in the sporting groups. For the purpose of the study an assumption was made. This assumption was that under steady state incremental conditions the heart rate and oxygen uptake relationship is as linear in children as it is in adults.