Interesting Research Article: Bilateral Squatting Mechanics Are Associated With Landing Mechanics in Anterior Cruciate Ligament Reconstruction Patients

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Bilateral Squatting Mechanics Are Associated With Landing Mechanics in Anterior Cruciate Ligament Reconstruction Patients: 
Peebles et al Am J Sport Med 21.

This study assessed 41 patients who had undergone ACLR, performing 15 unweighted bilateral squats and 10 bilateral stop jumps. The movements were assessed using three dimensional kinematics measuring peak knee abduction angle, knee abduction/adduction range of motion, peak vertical ground-reaction force limb symmetry index (LSI), vertical ground-reaction force impulse LSI, and peak knee extension moment LSI during the descending phase of the squatting and landing tasks.

Results: The peak vertical ground reaction force, the vertical ground reaction force impulse, and the peak knee extension movement were reduced in the surgical limb compared to the non- surgical limb during both the squatting and landing tasks.

Conclusion: This study shows that ACLR athletes shift their weight off their involved leg (lateral shift) and this correlates to altered landing mechanics in bilateral drop jump. Improving bilateral squatting techniques may translate to improved landing biomechanics.

How does this relate to the dorsaVi AMI test? 

The dorsaVi ViPerform AMI has been measuring bilateral squatting mechanics for over 4 years on >29k athletes. The AMI measures the lateral shift and subsequent offloading of the affected leg during the bilateral squat.

Another trend we see is a correlation of lateral shift with poor TSK-11 results 🧐. A score on TSK-11 of 19 or higher you are 13xs more likely to reinjure. One more reason ViPerform AMI is quickly becoming the tool for objective return to sport.

 

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