PMID: 3747809Aug 1, 1986Paper

Biomechanics of the squat exercise using a modified center of mass bar

Medicine and Science in Sports and Exercise
J E LanderP Devita

Abstract

The purpose of the study was to investigate the effects of load height on selected performance characteristics of a squat exercise. A lower center of mass bar was designed that allowed the integrity of the squat exercise to be maintained while possibly reducing the chances of injury. Five trials were performed with the center of mass of the bar was set at shoulder height (C1) and lowered 18% (C2) and 36% (C3) of the subject's height below the normal bar position using the inverted "U" bar. All trials were filmed as the subjects lifted on a force platform. A balloon catheter was inserted into the subject's recta to monitor intra-abdominal pressure (IAP). High correlations were found between IAP, joint moment, and force data. Many of the critical parameters occurred just after the lowest squat position. Significant differences (P less than 0.05) in trunk angle excursion and trunk angular velocity indicated a greater ease of hip extension for the center of mass bar conditions. No differences were observed between conditions for thigh and knee angles and joint moments indicating kinematic similarity for the lower extremity. IAP was always least for C2 and C3, while compression, shear, and back muscle forces did not differ. It was e...Continue Reading

Citations

Mar 1, 1994·Medical & Biological Engineering & Computing·J J Collins
Apr 21, 2016·Journal of Sports Sciences·Hayley S LeggJon E Goodwin
Feb 6, 2007·Medicine and Science in Sports and Exercise·Jan HoffJan Helgerud
Feb 22, 2012·Journal of Strength and Conditioning Research·Hagen HartmannDietmar Schmidtbleicher
Dec 14, 2011·Journal of Strength and Conditioning Research·A Page GlaveRo Di Brezzo
Mar 1, 1988·The Physician and Sportsmedicine·S J Fleck, W J Kraemer

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biomechanics

Biomechanics examines the generation of internal forces within the body and investigates the effects and control of forces that act on or are produced on tissues. Here are the latest discoveries.

Related Papers

Research Quarterly for Exercise and Sport
P J Russell, S J Phillips
Journal of Strength and Conditioning Research
Kimitake SatoDavid S Hydock
Journal of Strength and Conditioning Research
Kevin G Abelbeck
Medicine and Science in Sports and Exercise
J E LanderJ K Giacobbe
© 2021 Meta ULC. All rights reserved