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Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
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Establishing normative data on scapulothoracic musculature using handheld dynamometry.

Nichole Turner1, Kristen Ferguson, Britney W Mobley

  • 1Armstrong Atlantic State University, USA.

Journal of Sport Rehabilitation
|January 30, 2010
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Summary
This summary is machine-generated.

This study established normative strength data for scapulothoracic muscles in healthy individuals. The findings provide crucial unilateral ratios for scapular rehabilitation protocols.

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Area of Science:

  • Biomechanics
  • Kinesiology
  • Musculoskeletal Research

Background:

  • Scapular strength deficits are associated with shoulder dysfunction.
  • Establishing normative data is essential for clinical assessment.

Purpose of the Study:

  • To determine normative strength data for scapulothoracic muscles in healthy subjects.
  • To utilize a handheld dynamometer for precise measurements.

Main Methods:

  • A descriptive normative data study was conducted using field research.
  • 172 subjects with varied overhead activity levels were assessed.
  • Handheld dynamometry measured strength of trapezius, rhomboids, and serratus anterior muscles.

Main Results:

  • Unilateral ratios for scapular muscles were determined: Elevation:depression (2.5:1), upward:downward rotation (1.5:1), and protraction:retraction (1.25:1).
  • Activity level did not significantly impact these ratios.
  • A significant rank order of muscle strength was established.

Conclusions:

  • The established unilateral ratios and muscle strength rank order are vital for developing effective scapular rehabilitation strategies.
  • These normative data aid in identifying and addressing strength imbalances contributing to shoulder dysfunction.