Reaction Moment at the L5/S1 Joint During Simulated Forward Slipping With a Handheld Load |
| |
| Authors: | Jian Liu Thurmon Lockhart |
| |
| Institution: | 1. Division of Applied Science and Technology, Marshall University, Huntington, WV, USA;2. Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, USA |
| |
| Abstract: | The purpose of the study was to investigate the effects of load on the net moment response at the L5/S1 joint during simulated slip events. Six young individuals were instructed to take one step with a handheld load. Sudden floor movement was randomly introduced to simulate unexpected slips. Different loads conditions (0%, 10%, 20%, 30% of body weight) were introduced at random. Three-dimensional net moments at the L5/S1 joint were computed via downward inverse dynamic model. Peak joint moment generated at 30% load level was found to be significantly higher compared to no-load condition. No peak moment differences were found among no-load, 10% or 20% load levels. Additionally, the findings from this study indicated a flexiondominant net L5/S1 joint moment pattern during motion phase associated with slip-induced falls. |
| |
| Keywords: | back injury load carrying slips and falls reactive recovery |
|
|
