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A braced arm-to-thigh (BATT) lifting technique reduces lumbar spine loads in healthy and low back pain participants
- Source :
- Journal of biomechanics. 100
- Publication Year :
- 2019
-
Abstract
- Despite the common use of one-handed lifting techniques for activities of daily living, these techniques have received little attention in the biomechanics literature. The braced arm-to-thigh technique (BATT) is a one-handed lifting method in which the dominant hand picks up objects, while the free hand braces the trunk on the ipsilateral thigh. The aim of this study was to compare the BATT to two-handed or unsupported one-handed lifting techniques with loads of 2 and 10 kg, by evaluating trunk motion and spine loading at L4/L5. Twenty healthy participants (30–70 years old) matched in age and sex to 18 participants with low back pain were recruited to the study. A three-axis load cell secured to the distal anterior thigh measured the bracing forces applied by the hand. The OpenSim Lifting Full-Body model was used to estimate trunk kinematics and spinal loading at L4/L5. Linear mixed-effects models were developed to compare trunk angles and L4/L5 moments and forces between lifting techniques. Trunk flexion angles were significantly reduced for the BATT lift compared to one-handed and two-handed stoop lifts (9–20%). However, the BATT also increased asymmetric trunk kinematics and moments at L4/L5. The BATT produced significantly lower moments (28–38%), and compressive (25–32%) and antero-posterior shear (25–45%) forces at L4/L5, compared to unsupported lifting techniques. Bracing the hand on the thigh to support the trunk can substantially reduce low back loading during lifting tasks of 2 to 10 kg.
- Subjects :
- Adult
Male
Lifting
Trunk flexion
0206 medical engineering
Biomedical Engineering
Biophysics
02 engineering and technology
Thigh
Weight-Bearing
03 medical and health sciences
0302 clinical medicine
Activities of Daily Living
Pressure
Medicine
Humans
Orthopedics and Sports Medicine
Anterior compartment of thigh
Aged
Orthodontics
Braces
Lumbar Vertebrae
business.industry
Rehabilitation
Biomechanics
Middle Aged
020601 biomedical engineering
Trunk
Low back pain
Bracing
Biomechanical Phenomena
medicine.anatomical_structure
Arm
Lumbar spine
medicine.symptom
business
Low Back Pain
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 18732380
- Volume :
- 100
- Database :
- OpenAIRE
- Journal :
- Journal of biomechanics
- Accession number :
- edsair.doi.dedup.....7ff38c90a8cae1ccd92454bfc2629721