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Kinematic changes using weightlifting shoes on barbell back squat.

Kimitake Sato1, Dave Fortenbaugh, David S Hydock

  • 1Kinesiology Program, Arizona State University, Tempe, Arizona, USA. jpnsatok@hotmail.com

Journal of Strength and Conditioning Research
|December 29, 2011
PubMed
Summary
This summary is machine-generated.

Weightlifting shoes increase foot angle and reduce trunk lean during barbell back squats, potentially enhancing knee extensor activation and lowering lower back stress. Running shoes did not yield the same kinematic benefits.

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Area of Science:

  • Biomechanics
  • Sports Science
  • Kinesiology

Background:

  • Weightlifting shoes are designed to improve squat performance.
  • Understanding kinematic differences between weightlifting and running shoes is crucial for optimizing squat technique and injury prevention.

Purpose of the Study:

  • To validate the increased foot segment angle with weightlifting shoes.
  • To determine kinematic differences in the barbell back squat between weightlifting and running shoes.

Main Methods:

  • 25 college-aged participants performed barbell back squats at 60% of their 1-rep max.
  • Kinematics were analyzed in 2D using reflective markers on lower extremity joints and the barbell.
  • Repeated measures ANOVA was used to compare footwear conditions.

Main Results:

  • Weightlifting shoes resulted in a significant increase in foot segment angle (3.5°) and a reduction in trunk lean (22 mm) compared to running shoes.
  • Thigh segment peak flexion angle did not differ significantly between footwear conditions.
  • The observed kinematic changes with weightlifting shoes are hypothesized to reduce shear stress on the lower back and increase knee extensor muscle activation.

Conclusions:

  • Weightlifting shoes offer biomechanical advantages for the barbell back squat by promoting a more upright trunk and greater foot dorsiflexion.
  • These kinematic alterations may reduce injury risk and enhance performance, particularly for individuals with a tendency towards forward trunk lean.
  • Weightlifting shoes are recommended for individuals seeking to improve squat mechanics and knee extensor engagement.