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Lumbar contribution to the trunk forward bending and backward return; age-related differences
Milad Vazirian1, Iman Shojaei1, Anuj Agarwal1,2
1a Department of Biomedical Engineering , University of Kentucky , Lexington , KY , USA.
Ergonomics
|September 17, 2016
Summary
Older adults over 50 exhibit reduced lumbar contribution to trunk motion during bending. This age-related change in spinal mechanics may affect lower back health and requires further investigation.
Area of Science:
- Biomechanics
- Gerontology
- Human Movement Science
Background:
- Trunk motion is crucial for daily activities.
- Age-related changes in the musculoskeletal system can affect spinal function.
- Understanding lumbar contribution to trunk movement is vital for assessing lower back health.
Purpose of the Study:
- To investigate age-related differences in lumbar contribution to sagittal plane trunk motion.
- To compare lumbar motion across different age groups, genders, and paces.
- To explore the implications of these differences on lower back mechanics.
Main Methods:
- Sixty participants aged 20-70 years were divided into five age groups.
- Participants performed forward bending and backward return at slow and fast paces.
- Lumbar contribution to trunk motion in the sagittal plane was measured.
Main Results:
- Individuals over 50 years old showed smaller lumbar contribution compared to younger individuals.
- Female participants exhibited less lumbar contribution than male participants.
- Faster paces resulted in smaller lumbar contribution compared to slower paces.
Conclusions:
- Age-related reductions in lumbar contribution suggest altered synergy between active and passive lower back tissues in individuals over 50.
- These biomechanical changes may negatively impact lower back mechanics.
- Further detailed modeling is recommended to elucidate age-related differences in lower back mechanics during tasks involving significant trunk motion.
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