Objectives. To quantify the variability in lifting motions, trunk moments, and spinal loads
associated with repeated lifting exertions and to identify workplace factors that influence the …

Background. Physiological and psychophysical studies of the effects of lifting frequency
have focused on whole-body measurements of fatigue or subjective acceptance of the task …

Study Design. A repeated-measures in vivo experiment. Objective. To describe within-
subject variability of spinal compression in repetitive lifting. Summary of Background Data …

Study Design. Trunk and hip kinematic and spinal loading changes were documented as
experienced subjects performed a set of standard free-dynamic lifting tasks at various …

Study Design. An electromyogram-assisted free-dynamic lifting model was used to quantify
the patterns of complex spinal loads in subjects performing various lifting tasks. Objectives …

Objective Spine kinematics, kinetics, and trunk muscle activities were evaluated during
different stages of a fatigue-induced symmetric lifting task over time. Background Due to …

Background context: Previous research has documented differences in spine loading
between genders when the imposed load is normalized relative to the size of the person …

BACKGROUND: Low back loading and risk associated with pushing activities have been
poorly understood. Previous studies have demonstrated that increases in anterior/posterior …

Study Design. A repetitive lifting test in the sagittal plane was performed with a submaximal
load at a maximal lifting rate to understand the effects of fatigue on kinematic and kinetic …

Objective. To estimate the three-dimensional spinal loads during various lifting and lowering
tasks. Design. The in vivo measurements of the trunk dynamics, moments, and myoelectric …