Faculty Collaboration Database

Comparing Biomechanical Time Series Data During the Hang-Power Clean and Jump Shrug. J Strength Cond Res 2021 Sep 01;35(9):2389-2396

Date

04/23/2019

Pubmed ID

31009429

DOI

10.1519/JSC.0000000000003154

Scopus ID

2-s2.0-85099220646 (requires institutional sign-in at Scopus site)   7 Citations

Abstract

Kipp, K, Comfort, P, and Suchomel, TJ. Comparing biomechanical time series data during the hang-power clean and jump shrug. J Strength Cond Res 35(9): 2389-2396, 2021-The purpose of this study was to investigate differences in the force-, velocity-, displacement-, and power-time curves during the hang-power clean (HPC) and the jump shrug (JS). To this end, 15 male lacrosse players were recruited from a National Collegiate Athletic Association Division-I team, and performed one set of 3 repetitions of the HPC and JS at 70% of their HPC 1 repetition maximum (1RM HPC). Two in-ground force plates were used to measure the vertical ground reaction force (GRF) and calculate the barbell-lifter system mechanics during each exercise. The time series data were normalized to 100% of the movement phase, which included the initial countermovement and extension phases, and analyzed with curve analysis and statistical parametric mapping (SPM). The SPM procedure highlighted significant differences in the force-time curves of the HPC and JS between 85 and 100% of the movement phase. Likewise, the SPM procedure highlighted significant differences in the velocity- and power-time curve of the HPC and JS between 90 and 100% of the movement phase. For all comparisons, performance of the JS was associated with greater magnitudes of the mechanical outputs. Although results from the curve analysis showed significant differences during other periods of the movement phase, these differences likely reflect statistical issues related to the inappropriate analysis of time series data. Nonetheless, these results collectively indicate that when compared with the HPC, execution of the JS is characterized by greater GRF and barbell-lifter system velocity and power outputs during the final 10% of the movement phase.

Author List

Kipp K, Comfort P, Suchomel TJ

Author

Kristof Kipp BS,MS,PhD Assistant Professor in the Physical Therapy department at Marquette University

MESH terms used to index this publication - Major topics in bold

Biomechanical Phenomena
Exercise
Humans
Male
Movement
Muscle Strength
Racquet Sports
Weight Lifting