Reliability and Differences Between Sexes in Landing Mechanics when Performing the Lateral Bound Test.
Andy Waldhelm, Sydney Allen, Lacy Grand and 4 others
PMID 35391862WHAT IT FOUND
In 30 healthy non-athletes, repeated lateral bounds measured landing knee angles mostly stayed consistent when the same rater reviewed videos, but week-to-week measurements varied, especially initial knee bend.
Males showed more inward knee collapse than females.
Key findings
01The same rater measured landing knee angles consistently across all variables.
02Week-to-week consistency was uneven, with dominant-leg initial knee bend least consistent and maximum dominant-leg knee bend and valgus most consistent.
03Males showed greater dynamic knee valgus on both legs than females, while knee flexion angles did not differ significantly.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The sample was small and consisted of healthy non-athletes, so it does not show how athletes or people recovering from ACL injury would land. Only one rater analysed the videos, so agreement between different clinicians was not tested. The hurdle height and distance were fixed, which may have made the task easier or harder depending on participant height. Video capture was limited to 60 frames per second, which may reduce accuracy for initial knee bend. Test-retest consistency varied across landing measures, so a single week-to-week score may not be stable.
The easy way to misread this
Do not use this study to conclude that the lateral bound test identifies athletes at higher ACL injury risk. It tested measurement consistency in healthy non-athletes and found males, not females, had greater dynamic knee valgus, with no injury outcomes assessed.