The effect of a physical activity intervention package on the self-esteem of pre-adolescent and adolescent females Author: Boyd KR//Hyrcaiko DW Conference/Journal: Journal of Adolescence Date published: 1997 Other: Volume ID: 32 , Issue ID: 1 , Word Count: 51 The effect of a physical activity intervention package on the self-esteem of pre-adolescent and adolescent females A study on the effect of a physical activity intervention package on the self-esteem of pre and post adolescent females showed the greatest increase in over all self-esteem, post intervention, was in the pre-adolescent girls.