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Biomechanical Changes Related to Low Back Pain: An Innovative Tool for Movement Pattern Assessment and Treatment Evaluation in Rehabilitation
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Relationships Between Trunk Movement Patterns During Lifting Tasks Compared With Unloaded Extension From a Flexed

Yuta Ogata1, Masaya Anan2, Makoto Takahashi2

  • 1Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan.

Journal of Manipulative and Physiological Therapeutics
|March 19, 2018
PubMed
Summary

Hip movement during unloaded trunk flexion influences lumbar extension during lifting. This finding offers new insights for manual therapists on human movement patterns during lifting tasks.

Keywords:
LiftingLow Back PainPhysical Therapist AssistantsSpine

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Area of Science:

  • Biomechanics
  • Kinesiology
  • Human Movement Analysis

Background:

  • Understanding the biomechanics of lifting is crucial for preventing injuries and optimizing physical therapy interventions.
  • Previous research has explored trunk and lumbar movement during lifting, but the relationship with unloaded trunk flexion is less understood.

Purpose of the Study:

  • To investigate the relationship between trunk extension movement patterns during unloaded full flexion and lifting techniques.
  • To provide valuable information for physical therapists, doctors of chiropractic, and manual therapists regarding lifting mechanics.

Main Methods:

  • A within-participant study design was employed.
  • Whole-body kinematic and kinetic data were collected from 16 healthy male participants using a 3D motion analysis system.
  • Pearson correlation coefficients were calculated to assess the relationships between joint movements during lifting and unloaded trunk flexion.

Main Results:

  • No significant correlation was found between lumbar extension during the first half of lifting and unloaded lumbar movement.
  • Lumbar extension during lifting was significantly negatively correlated with hip movement during unloaded trunk flexion and extension (P < .05).

Conclusions:

  • The maximum hip flexion angle during full trunk flexion significantly influences the kinematics of the lumbar-hip complex during lifting.
  • Findings suggest that hip mobility during unloaded movements plays a key role in lifting mechanics.
  • Study limitations include a sample of healthy males, restricting generalizability to this demographic.