Assessment of Lumbar Vertebral Load Under Maximum Acceptable Weight of Psychophysics for Lifting
| Autor: | Jen-Chieh Miao, 苗人傑 |
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| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 In this study, psychophysical approach is adopted to evaluate the maximum acceptable weight of lift (MAWL) when participants lifting box under sagittal plane. Nine males students are recruited and categorized into three groups based on their Body Mass Index (BMI) (group 1 : BMI24 ). MAWL is determined by fixed frequency (1 lift/min) under three different sagittal plane heights (148.5cm, 98.5cm and 48.5cm) while participants lift objects and then biomechanics is adopted to investigate the lumbar vertebral load value by The Motion Monitor™ 3D motion detection system. The results reveal that: 1.Height significantly influences MAWL value. While height decreases, MAWL value increase. MAWL value is shown greatest under height 48.5cm and lowest under height 148.5cm. 2.Three groups with different BMI value significantly influence MAWL value. While BMI value increases, MAWL value increases. MAWL value of group 3 is the greatest. 3.Under Motion Monitor, height significantly influences value of lumbar vertebrae load. While the height decreases, the lumbar vertebrae load value increases. While lifting under height 48.5cm, the value is over action limit 3400N. 4.Groups with different BMI value significantly influence the value of lumbar vertebrae load. While BMI value increases, the lumbar vertebrae load value increases Lumbar vertebrae load value of group 3 is the greatest. 5.RPE results illustrate that lifting under height 148.5cm and 48.5cm,the most stressful parts of the body are arms (score shows respectively that 13.00 and 13.33;under height 48.5cm,the most stressful parts of body are lags and lower back (score shows respectively that 14 and 14). 6.Using BMI participants at three different sagittal plane heights of lifting to measure lumbar vertebral load value and establish the multiple regression model to reference. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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