Intra and inter-tester reliability of the tuck jump assessment

ObjectiveTo assess the inter-tester and intra-tester reliability of the tuck jump test.DesignRepeated measures.SettingUniversity Human Performance laboratory.ParticipantsFive male and 5 female athletes undertook the Tuck jump test which was then assessed by two independent assessors.Main outcome measuresScore from the video assessment of the tuck jump test by two independent assessors on two separate occasions.ResultsAverage 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.ConclusionThe 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.