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Related Experiment Video

Updated: Jan 4, 2026

An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
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The relationship between single-limb squat and jump-cut kinematics.

Samantha E Scarneo-Miller1, Jarrett E Sorge2, Eleanor M Beltz3

  • 1Department of Kinesiology, Korey Stringer Institute, University of Connecticut, Storrs, CT, USA.

Sports Biomechanics
|November 12, 2019
PubMed
Summary

The single-limb squat (SLS) may predict jump-cut (JC) performance in athletes after anterior cruciate ligament reconstruction (ACLR). Deficits in SLS control correlate with poorer JC biomechanics, aiding rehabilitation progression.

Keywords:
Anterior cruciate ligamentanterior cruciate ligament reconstructionreturn to play

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Area of Science:

  • Biomechanics
  • Orthopedics
  • Sports Medicine

Background:

  • Objective criteria are lacking for advancing athletes post-anterior cruciate ligament reconstruction (ACLR) to cutting maneuvers.
  • Assessing functional movement patterns is crucial for safe return to sport.

Purpose of the Study:

  • To investigate the relationship between the single-limb squat (SLS) and jump-cut (JC) tasks in individuals with and without ACLR.
  • To identify potential biomechanical predictors for return-to-sport readiness.

Main Methods:

  • A case-control laboratory study compared 23 participants with ACLR to 23 healthy controls.
  • Bilateral kinematic data were collected during SLS and JC tasks.
  • Correlations and independent sample t-tests analyzed kinematic data between tasks and groups.

Main Results:

  • Peak trunk rotation and medial knee displacement during JC were strongly correlated with SLS performance (r² = 0.63).
  • The ACLR group exhibited less sagittal plane motion during both SLS and JC compared to controls.
  • Reduced frontal and transverse plane control during SLS was associated with increased lateral trunk flexion, hip adduction, and medial knee displacement during JC.

Conclusions:

  • The single-limb squat (SLS) demonstrates potential as a clinical predictor for jump-cut (JC) task performance in ACLR rehabilitation.
  • Biomechanical deficits in the SLS may translate to increased injury risk during cutting maneuvers.