The Tuck Jump Assessment (TJA) is commonly used in football to assess jump landing technique. The aims of this study were to determine inter-rater agreement and internal consistency of the TJA and to identify commonly occurring technique flaws. Sixty elite female football players (mean (±SD): age = 20.27 ± 3.44 years) were video recorded whilst undertaking the TJA and independently assessed by 4 raters. Clinically acceptable levels of agreement were reached for "lower extremity valgus at landing" k = 0.83 (95% CI, 0.72-0.93); "thighs do not reach parallel" k = 0.84 (95% CI, 0.74-0.94); "thighs not equal side to side"k = 0.86 (95% CI, 0.75- 0.96). The level of agreement for the composite score of all 10 criteria ranged from kw = 0.62 (95% CI, 0.48-0.76) to Kw = 0.80 (95% CI, 0.70-0.90) suggesting a "fair-to-very good" level of inter-rater agreement. The most common technique flaws were found for criterion 2 "thighs do not reach parallel" 20 (N = 147/665) and criterion 1 "knee valgus on landing" (N = 80/665). Internal consistency results suggest that the TJA is not unidimensional. We suggest "knee valgus on landing" may have clinical utility although further research is needed.
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