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Kinematics and kinetics of the dead lift in adolescent power lifters.
Med Sci Sports Exerc. 1985 Oct; 17(5):554-66.MS

Abstract

This study documented characteristics of the dead lift of teenage lifters. Films of 10 "skilled" and 11 "unskilled" contestants in a Michigan Teenage Powerlifting Championship provided data for analysis. Equations of motion, force, and moments were developed for a multisegment model of the lifters' movement in the sagittal plane and applied to the film data. Analysis was limited to 1) body segment orientations, 2) vertical bar accelerations, 3) vertical joint reaction forces, 4) segmental angular accelerations, 5) horizontal moment arms of the bar to selected joints, and 6) intersegmental resultant moments. Significant differences (P less than 0.05) in body segment orientation indicated a more upright posture at lift-off in the skilled group. Maximum vertical bar acceleration and angular acceleration of the trunk tended to occur near lift-off in the skilled lifters. The unskilled subjects demonstrated greater variability and magnitude in linear and angular acceleration parameters. In all lifters, maximum vertical force was experienced at the ankle joint. Within each subject, the hip joint experienced the greatest torque because of the relatively large horizontal moment arm of the bar (dominant mass in the system) to this joint. In all subjects, the magnitude of the mass lifted, and not the technique, was the primary determinant in the intersegmental resultant moment acting at the hip and the vertical force experienced at the ankle, knee, and hip joints.

Authors

No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

4068962

Citation

Brown, E W., and K Abani. "Kinematics and Kinetics of the Dead Lift in Adolescent Power Lifters." Medicine and Science in Sports and Exercise, vol. 17, no. 5, 1985, pp. 554-66.
Brown EW, Abani K. Kinematics and kinetics of the dead lift in adolescent power lifters. Med Sci Sports Exerc. 1985;17(5):554-66.
Brown, E. W., & Abani, K. (1985). Kinematics and kinetics of the dead lift in adolescent power lifters. Medicine and Science in Sports and Exercise, 17(5), 554-66.
Brown EW, Abani K. Kinematics and Kinetics of the Dead Lift in Adolescent Power Lifters. Med Sci Sports Exerc. 1985;17(5):554-66. PubMed PMID: 4068962.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Kinematics and kinetics of the dead lift in adolescent power lifters. AU - Brown,E W, AU - Abani,K, PY - 1985/10/1/pubmed PY - 1985/10/1/medline PY - 1985/10/1/entrez SP - 554 EP - 66 JF - Medicine and science in sports and exercise JO - Med Sci Sports Exerc VL - 17 IS - 5 N2 - This study documented characteristics of the dead lift of teenage lifters. Films of 10 "skilled" and 11 "unskilled" contestants in a Michigan Teenage Powerlifting Championship provided data for analysis. Equations of motion, force, and moments were developed for a multisegment model of the lifters' movement in the sagittal plane and applied to the film data. Analysis was limited to 1) body segment orientations, 2) vertical bar accelerations, 3) vertical joint reaction forces, 4) segmental angular accelerations, 5) horizontal moment arms of the bar to selected joints, and 6) intersegmental resultant moments. Significant differences (P less than 0.05) in body segment orientation indicated a more upright posture at lift-off in the skilled group. Maximum vertical bar acceleration and angular acceleration of the trunk tended to occur near lift-off in the skilled lifters. The unskilled subjects demonstrated greater variability and magnitude in linear and angular acceleration parameters. In all lifters, maximum vertical force was experienced at the ankle joint. Within each subject, the hip joint experienced the greatest torque because of the relatively large horizontal moment arm of the bar (dominant mass in the system) to this joint. In all subjects, the magnitude of the mass lifted, and not the technique, was the primary determinant in the intersegmental resultant moment acting at the hip and the vertical force experienced at the ankle, knee, and hip joints. SN - 0195-9131 UR - https://www.unboundmedicine.com/medline/citation/4068962/Kinematics_and_kinetics_of_the_dead_lift_in_adolescent_power_lifters_ L2 - https://journals.lww.com/4068962.pmid DB - PRIME DP - Unbound Medicine ER -