Details of participants’ individual positive psychological development are shown in Table 1. A majority of swimmers (n = 34/36; 94%) improved their mean scores. It should be noted that initial data exploration revealed Participants 6 and 18 to be outliers. Excluding their data, a 15.88% mean post-intervention improvement was recorded (18.78% mean improvement when Participants’ 6 and 18 data are included). Subsequent analysis of positive psychological development data excluded those of Participants 6 and 18. Means and standard deviations of all variables at the cessation of the intervention are presented in Table 4. Paired sample t tests showed that levels of all measured dependent variables (with the exception of challenge) improved significantly between the pre- and post-intervention measurements. Table 5 summarizes the number of participants who changed their positive psychological construct scores.