Back squat assessment movement competency as a screening tool can identify biomechanical deficits that may reduce movement pattern compentence. The Back-Squat Assessment (BSA) was developed to quanitfy movement quality and identify functional deficits in the squat movement. The ICC for BSA novel three-point total score revealed excellent intrarater agreement for both maturity groups. The ICC also revealed excellent interrater agreement for both maturity groups, with good strength of aggreement for pre-PHV and very good strength of aggreement for post-PHV. The Mann Whitney U test showed that the pre-PHV group had a significantly higher total BSA score than the post-PHV group. Wilcoxon r test showed no signifiant between group differences between the two scores for the pre-PHV group z=1.897 and the post-PHV group z=0.816. The current study has established both intra-rater reliability and inter-rater reliability for the three-level BSA for pre-PHV and post-PHV male athletes. The pre-PHV group had significantly higher median score on the BSA than the post-PHV group. BSA performance did not predict CMJ performance.
