The effects of prolonged sitting, standing, and an alternating sit-stand pattern on trunk mechanical stiffness, trunk muscle activation and low back discomfort

JH Park, D Srinivasan - Ergonomics, 2021 - Taylor & Francis
Sit-stand desks continue to be a popular intervention for office work. While previous studies
have reported changes in subjective measures, there is limited understanding of how sit …

Comparison of lumbo-pelvic kinematics during trunk forward bending and backward return between patients with acute low back pain and asymptomatic controls

I Shojaei, EG Salt, Q Hooker, LR Van Dillen… - Clinical …, 2017 - Elsevier
Background Prior studies have reported differences in lumbo-pelvic kinematics during a
trunk forward bending and backward return task between individuals with and without …

The effect of static neck flexion on mechanical and neuromuscular behaviors of the cervical spine

R Mousavi-Khatir, S Talebian, N Toosizadeh… - Journal of …, 2018 - Elsevier
Occupations that involve sustained or repetitive neck flexion are associated with a higher
incidence of neck pain. Little in vivo information is available on the impact of static neck …

Age-related differences in the timing aspect of lumbopelvic rhythm during trunk motion in the sagittal plane

M Vazirian, I Shojaei, B Bazrgari - Human movement science, 2017 - Elsevier
Forward bending and backward return of the human trunk in the sagittal plane are
associated with a specific lumbopelvic rhythm, which consists of magnitude and timing …

Mechanical demands on the lower back in patients with non-chronic low back pain during a symmetric lowering and lifting task

I Shojaei, EG Salt, Q Hooker, B Bazrgari - Journal of biomechanics, 2018 - Elsevier
There is limited information in the literature related to the lower back loading in patients with
LBP, particularly those with non-chronic LBP. Toward addressing such a research gap, a …

Viscoelastic response of the human lower back to passive flexion: the effects of age

I Shojaei, K Allen-Bryant, B Bazrgari - Annals of biomedical engineering, 2016 - Springer
Low back pain is a leading cause of disability in the elderly. The potential role of spinal
instability in increasing risk of low back pain with aging was indirectly investigated via …

Distinguishing chronic low back pain in young adults with mild to moderate pain and disability using trunk compliance

A Stamenkovic, BC Clark, PE Pidcoe… - Scientific Reports, 2021 - nature.com
Chronic low back pain (cLBP) rates among younger individuals are rising. Although pain
and disability are often less severe, underlying changes in trunk behavior may be …

Reliability of recurrence quantification analysis of postural sway data. A comparison of two methods to determine recurrence thresholds

W van den Hoorn, PW Hodges, JH van Dieen… - Journal of …, 2020 - Elsevier
Ageing affects balance control resulting in a greater amplitude of sway and alterations in
structure of the sway time series. Recurrence quantification analysis (RQA) has been used …

The effect of muscle direction on the predictions of finite element model of human lumbar spine

R Zhu, W Niu, Z Wang, X Pei, B He… - BioMed research …, 2018 - Wiley Online Library
The normal physiological loads from muscles experienced by the spine are largely unknown
due to a lack of data. The aim of this study is to investigate the effects of varying muscle …

Trunk stiffness decreases and trunk damping increases with experimental low back pain

W van den Hoorn, J Cholewicki, MW Coppieters… - Journal of …, 2020 - Elsevier
Movement adaptations to low back pain (LBP) are believed to protect the painful area.
Increased trunk stiffness and decreased trunk damping have been shown in people with …