The effects of load on system and lower-body joint kinetics during jump squats

To investigate the effects of different loads on system and lower-body kinetics during jump squats, 12 resistance-trained men performed jumps under different loading conditions: 0%, 12%, 27%, 42%, 56%, 71%, and 85% of 1-repetition maximum (1-RM). System power output was calculated as the product of...

Full description

Saved in:
Bibliographic Details
Published in:Sports biomechanics 2012-11, Vol.11 (4), p.492-506
Main Authors: Moir, Gavin L., Gollie, Jared M., Davis, Shala E., Guers, John J., Witmer, Chad A.
Format: Article
Language:English
Subjects:
Adolescent
Ankle Joint - physiology
Bioenergetics
Biomechanical Phenomena
Biomechanics
Exercise - physiology
force plates
Hip Joint - physiology
Human performance
Humans
Jumping
Kinetics
Knee
Knee Joint - physiology
Load
Male
motion analysis
Resistance Training
training/conditioning
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To investigate the effects of different loads on system and lower-body kinetics during jump squats, 12 resistance-trained men performed jumps under different loading conditions: 0%, 12%, 27%, 42%, 56%, 71%, and 85% of 1-repetition maximum (1-RM). System power output was calculated as the product of the vertical component of the ground reaction force and the vertical velocity of the bar during its ascent. Joint power output was calculated during bar ascent for the hip, knee, and ankle joints, and was also summed across the joints. System power output and joint power at knee and ankle joints were maximized at 0% 1-RM (p 
ISSN:1476-3141
1752-6116
DOI:10.1080/14763141.2012.725426