publication . Article . 2009

PLAD (personal lift assistive device) stiffness affects the lumbar flexion/extension moment and the posterior chain EMG during symmetrical lifting tasks

David M. Frost; Mohammad Abdoli-E; Joan M. Stevenson;
Closed Access
  • Published: 10 Feb 2009 Journal: Journal of Electromyography and Kinesiology, volume 19, pages e403-e412 (issn: 1050-6411, Copyright policy)
  • Publisher: Elsevier BV
Abstract
The PLAD (personal lift assistive device) was designed to reduce the lumbar moment during lifting and bending tasks via elastic elements. This investigation examined the effects of modulating the elastic stiffness. Thirteen men completed 90 lifts (15 kg) using 6 different PLAD stiffnesses in stoop, squat and freestyle lifting postures. The activity of 8 muscles were recorded (latissimus dorsi, thoracic and lumbar erector spinae, rectus abdominis, external oblique, gluteus maximus, biceps femoris and rectus femoris), 3D electromagnetic sensors tracked the motion of each segment and strain gauges measured the elastic tension. EMG data were rectified, filtered, nor...
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Subjects
Medical Subject Headings: body regionsmusculoskeletal systemmusculoskeletal diseaseshuman activities
free text keywords: Clinical Neurology, Biophysics, Neuroscience (miscellaneous), Squat, Stiffness, medicine.symptom, medicine, Lumbar, Assistive device, Flexion extension, Lift (force), business.industry, business, Muscle activity, Physical medicine and rehabilitation, medicine.medical_specialty, Biceps, Physical therapy
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