Kinematics, Kinetics and Muscle Activity Analysis during Single-leg Drop-jump Landing Followed by an Unanticipated Task: Focusing on Differences in Neurocognitive Function.
Satoshi Shibata, Masahiro Takemura, Shumpei Miyakawa
PMID 37795316WHAT IT FOUND
Female athletes with lower processing speed scores rotated their trunk more toward the landing leg during a drop-jump.
However, knee angles, forces and muscle activity did not differ between groups, so this test alone did not identify the classic ACL injury mechanics.
Key findings
01Athletes with lower neurocognitive scores showed significantly greater trunk rotation toward the stance leg during landing compared to high scorers.
02There were no significant differences between the groups in knee joint moments, hip joint moments, or muscle activity levels.
03The observed trunk rotation difference was very small and may not be clinically significant.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Very small sample size (15 participants) means the study lacked statistical power to detect real differences. The unanticipated task was a simple arrow on a screen, which does not reflect the complexity of real sports situations. The single-leg drop-jump is not a common movement in basketball or soccer, limiting ecological validity. All participants had high processing speed scores, so the study did not include athletes with genuinely low neurocognitive function. Surface marker motion capture can introduce errors in measuring joint angles due to skin movement.
The easy way to misread this
Do not assume that low processing speed scores predict ACL injury risk. The study found no differences in knee mechanics or muscle activity between groups, and the authors state the relationship with injury risk is unclear.