Safety and Health at Work Vol. 11 Issue 3 2020
The Effects of Ramp Gradients and PushingePulling Techniques on Lumbar Spinal Load in Healthy Workers (Original Article)
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Title
Safety and Health at Work Vol. 11 Issue 3 2020
The Effects of Ramp Gradients and PushingePulling Techniques on Lumbar Spinal Load in Healthy Workers (Original Article)
The Effects of Ramp Gradients and PushingePulling Techniques on Lumbar Spinal Load in Healthy Workers (Original Article)
Subject
Manual handling, Pulling, Pushing, Slope of ramp floor, Spinal load
Description
Background: Many tasks in industrial and health care setting are involved with pushing and pulling tasks up or down on a ramp. An efficient method of moving cart which reduces the risk of low back pain
should be concerned. This study aimed to investigate the effects of handling types (HTs) and slope on lumbar spinal load during moving a cart on a ramp. We conducted a 2 2 4 factorial design with three main factors: 2 HTs, 2 handling directions of moving a cart and 4 degrees of ramp slope.
Methods: Thirty healthy male workers performed 14 tasks consist of moving a cart up and down on the ramp of 0, 10, 15, and 20 degrees with pushing and pulling methods. Joint angles from a 3D motion
capture system combined with subject height, body weight, and hand forces were used to calculate the
spinal load by the 3DSSPP program.
Results: Our results showed significant effect of HT, handling directions and slope on compression and
shear force of the lumbar spine (p < 0.001). When the ramp gradient increased, the L4/5 compression
forces increased in both pushing and pulling (p < 0.001) Shear forces increased in pulling and decreased in pushing in all tasks. At high slopes, pulling generated more compression and shear forces than that of pushing (p < 0.01).
Conclusion: Using the appropriate technique of moving a cart on the ramp can reduce the risk of high spinal load, and the pushing is therefore recommended for moving a cart up/down on ramp gradients.
should be concerned. This study aimed to investigate the effects of handling types (HTs) and slope on lumbar spinal load during moving a cart on a ramp. We conducted a 2 2 4 factorial design with three main factors: 2 HTs, 2 handling directions of moving a cart and 4 degrees of ramp slope.
Methods: Thirty healthy male workers performed 14 tasks consist of moving a cart up and down on the ramp of 0, 10, 15, and 20 degrees with pushing and pulling methods. Joint angles from a 3D motion
capture system combined with subject height, body weight, and hand forces were used to calculate the
spinal load by the 3DSSPP program.
Results: Our results showed significant effect of HT, handling directions and slope on compression and
shear force of the lumbar spine (p < 0.001). When the ramp gradient increased, the L4/5 compression
forces increased in both pushing and pulling (p < 0.001) Shear forces increased in pulling and decreased in pushing in all tasks. At high slopes, pulling generated more compression and shear forces than that of pushing (p < 0.01).
Conclusion: Using the appropriate technique of moving a cart on the ramp can reduce the risk of high spinal load, and the pushing is therefore recommended for moving a cart up/down on ramp gradients.
Creator
Chalearmpong Pinupong, Wattana Jalayondeja, Keerin Mekhora, Petcharatana Bhuanantanondh, Chutima Jalayondeja
Publisher
Elsevier Korea LLC
Date
September 2020
Contributor
Sri Wahyuni
Format
PDF
Language
English
Type
Text
Coverage
Safety and Health at Work Vol. 11 Issue 3 2020
Files
Citation
Chalearmpong Pinupong, Wattana Jalayondeja, Keerin Mekhora, Petcharatana Bhuanantanondh, Chutima Jalayondeja , “Safety and Health at Work Vol. 11 Issue 3 2020
The Effects of Ramp Gradients and PushingePulling Techniques on Lumbar Spinal Load in Healthy Workers (Original Article),” Repository Horizon University Indonesia, accessed March 12, 2025, https://repository.horizon.ac.id/items/show/2032.
The Effects of Ramp Gradients and PushingePulling Techniques on Lumbar Spinal Load in Healthy Workers (Original Article),” Repository Horizon University Indonesia, accessed March 12, 2025, https://repository.horizon.ac.id/items/show/2032.