User profiles for Jack Callaghan
 | Jack P. CallaghanKinesiology, University of Waterloo Verified email at uwaterloo.ca Cited by 13448 |
Low back joint loading and kinematics during standing and unsupported sitting
JP Callaghan, SM McGill - Ergonomics, 2001 - Taylor & Francis
The aim was to examine lumbar spine kinematics, spinal joint loads and trunk muscle activation
patterns during a prolonged (2 h) period of sitting. This information is necessary to assist …
patterns during a prolonged (2 h) period of sitting. This information is necessary to assist …
The relationship between lumbar spine load and muscle activity during extensor exercises
JP Callaghan, JL Gunning, SM McGill - Physical therapy, 1998 - academic.oup.com
Background and Purpose. There have been no previous studies that quantitatively
assessed the load on the spine during extensor exercises. The purpose of our study was to …
assessed the load on the spine during extensor exercises. The purpose of our study was to …
Elimination of electrocardiogram contamination from electromyogram signals: An evaluation of currently used removal techniques
JDM Drake, JP Callaghan - Journal of electromyography and kinesiology, 2006 - Elsevier
Trunk electromyographic signals (EMG) are often contaminated with heart muscle electrical
activity (ECG) due to the proximity of the collection sites to the heart and the volume …
activity (ECG) due to the proximity of the collection sites to the heart and the volume …
Low back three-dimensional joint forces, kinematics, and kinetics during walking
JP Callaghan, AE Patla, SM McGill - Clinical Biomechanics, 1999 - Elsevier
Objective. The purpose of this study was to examine the three-dimensional low back loads,
spinal motions, and trunk muscular activity during gait. Specific objectives involved …
spinal motions, and trunk muscular activity during gait. Specific objectives involved …
Using the Functional Movement Screen™ to evaluate the effectiveness of training
Frost, DM, Beach, TAC, Callaghan, JP, and McGill, SM. Using the functional movement
screen™ to evaluate the effectiveness of training. J Strength Cond Res 26 (6): 1620–1630, 2012…
screen™ to evaluate the effectiveness of training. J Strength Cond Res 26 (6): 1620–1630, 2012…
The impact of sit–stand office workstations on worker discomfort and productivity: a review
T Karakolis, JP Callaghan - Applied ergonomics, 2014 - Elsevier
This review examines the effectiveness of sit–stand workstations at reducing worker discomfort
without causing a decrease in productivity. Four databases were searched for studies on …
without causing a decrease in productivity. Four databases were searched for studies on …
Intervertebral disc herniation: studies on a porcine model exposed to highly repetitive flexion/extension motion with compressive force
JP Callaghan, SM McGill - Clinical biomechanics, 2001 - Elsevier
Objective. To determine whether repeated motion with low magnitude joint forces, and
flexion/extension moments consistently produce herniation in a non-degenerated, controlled …
flexion/extension moments consistently produce herniation in a non-degenerated, controlled …
Effects of prolonged sitting on the passive flexion stiffness of the in vivo lumbar spine
BACKGROUND CONTEXT: Prolonged sitting may alter the passive stiffness of the lumbar
spine. Consequently, performing full lumbar flexion movements after extended periods of …
spine. Consequently, performing full lumbar flexion movements after extended periods of …
Gluteus medius muscle activation patterns as a predictor of low back pain during standing
…, DE Gregory, DA Winter, JP Callaghan - Clinical …, 2008 - Elsevier
BACKGROUND: Low back pain is a primary source of disability and economic costs. Altered
trunk muscle activation in people with low back pain, specifically agonist/antagonist co-…
trunk muscle activation in people with low back pain, specifically agonist/antagonist co-…
Examination of the flexion relaxation phenomenon in erector spinae muscles during short duration slumped sitting
JP Callaghan, NM Dunk - Clinical Biomechanics, 2002 - Elsevier
Objective. The purpose of this study was to examine the myoelectric activity of the erector
spinae muscles of the back in order to determine if the flexion relaxation phenomenon occurs …
spinae muscles of the back in order to determine if the flexion relaxation phenomenon occurs …
