No / Objective To assess the inter-tester and intra-tester reliability of the tuck jump test. Design Repeated measures. Setting University Human Performance laboratory. Participants Five male and 5 female athletes undertook the Tuck jump test which was then assessed by two independent assessors. Main outcome measures Score from the video assessment of the tuck jump test by two independent assessors on two separate occasions. Results Average percentage of exact agreement (PEA) between the two testers across all scoring criteria for all subjects was 93% (range 80–100%). Both testers were in absolute 100% agreement in 5 out of 10 subjects for all of the scoring criteria. The kappa measure of agreement was k = 0.88 which is very good/excellent. The intra-tester PEA ranged 87.2%–100%, with kappa values of k = 0.86–1.0. Conclusion The study showed very good–excellent intra-tester and inter-tester reliability for both examiners when comparing their individual scores of the tuck jump test across two analysis sessions. These findings indicate that the proposed tuck jump assessment is reliable to identify abnormal landing mechanics.