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Related Experiment Videos

Carry it on the bad side!

V Tan1, M J Klotz, A S Greenwald

  • 1Department of Orthopaedic Surgery, Hospital of the University of Pennsylvania, Philadelphia, USA.

American Journal of Orthopedics (Belle Mead, N.J.)
|October 31, 1998
PubMed
Summary
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Carrying objects in the contralateral hand significantly increases hip joint forces in patients with hip disease. Carrying loads in the ipsilateral hand reduces these forces, offering a beneficial strategy for hip joint load management.

Area of Science:

  • Orthopedics
  • Biomechanics
  • Biomedical Engineering

Background:

  • Patients with hip disease often carry objects during ambulation.
  • Guidance on optimal hand use for load carriage is lacking.
  • Understanding hip joint forces is crucial for managing hip conditions.

Purpose of the Study:

  • To mathematically determine hip joint forces when loads are carried in the ipsilateral versus contralateral hand.
  • To provide evidence-based recommendations for load carriage in patients with hip disease.

Main Methods:

  • Utilized a free-body diagram analysis.
  • Modeled single-leg supported stance.
  • Calculated resultant hip forces for different load carriage scenarios.

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Main Results:

  • Carrying a load in the contralateral hand substantially increased hip joint forces.
  • Carrying a load in the ipsilateral hand resulted in lower hip joint forces compared to no load.
  • Hip forces were significantly greater when the load was carried contralaterally.

Conclusions:

  • Patients with hip disease should carry objects in the ipsilateral hand to minimize hip joint forces.
  • Ipsilateral load carriage offers a biomechanically advantageous strategy for hip joint protection.
  • Further research should explore clinical applications of these findings.