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Deformation of Member under Multiple Loadings01:11

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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
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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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The Effects of Torso-Borne Loads on Functional Movement Patterns.

Kathryn S Bell1, Jasmine D Brooks1, Kara N Radzak1

  • 1Department of Kinesiology and Nutrition Sciences, University of Nevada, Las Vegas, Las Vegas, NV, USA.

International Journal of Exercise Science
|September 10, 2024
PubMed
Summary
This summary is machine-generated.

Wearing tactical vests significantly impairs functional movement patterns in tactical athletes. Loaded movement screens are recommended for assessing performance and injury risk in these populations.

Keywords:
Tactical athleteinjury riskload carriagemovement screening

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Area of Science:

  • Biomechanics and Kinesiology
  • Occupational Health and Safety
  • Sports Science and Performance Analysis

Background:

  • Functional movement is crucial for daily activities and assessing injury risk.
  • Tactical personnel (police, military, fire) frequently carry heavy torso-borne loads during duty.
  • External loads can significantly impact physical performance and movement efficiency.

Purpose of the Study:

  • To compare functional movement screen results under loaded and unloaded conditions.
  • To identify the effects of torso-borne body armor on tactical performance.
  • To provide objective data on how external loads influence functional movement.

Main Methods:

  • Twenty-four physically active participants (11 males, 13 females) were recruited.
  • Participants completed the Fusionetics™ Movement Efficiency Test (FMET) in two counterbalanced conditions: loaded (13.5 kg vest) and unloaded.
  • Movement performances were video recorded and scored for overall and subscale quality.

Main Results:

  • A significant decline in overall functional movement quality was observed in the loaded condition (12.6±7.3 points, p<.001, d=1.8).
  • Statistically significant decreases were noted in 2-leg squat (d=0.8), push-ups (d=1.1), shoulder (d=2.1), and trunk movements (d=0.9).
  • No significant effects of load were found on cervical or 1-leg squat movements.

Conclusions:

  • Torso-borne body armor significantly reduces functional movement pattern quality in tactical athletes.
  • These findings suggest that functional movement screens should incorporate external loads for tactical populations.
  • Loaded movement assessments may offer a more accurate evaluation of readiness and injury risk for tactical personnel.