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BIOMECHANICAL ASSESSMENT OF A LIFT ASSIST DEVICE IN A JACKHAMMERING TASK

Jackhammer. BIOMECHANICAL ASSESSMENT OF A LIFT ASSIST DEVICE IN A JACKHAMMERING TASK. Lift Assist. METHODS. Comparisons through percent change: Percent Change=( Data w / lift assist – Data w /out lift assist )/ Data w /out lift assist Statistics:

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BIOMECHANICAL ASSESSMENT OF A LIFT ASSIST DEVICE IN A JACKHAMMERING TASK

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  1. Jackhammer BIOMECHANICAL ASSESSMENT OF A LIFT ASSIST DEVICE IN A JACKHAMMERING TASK Lift Assist

  2. METHODS • Comparisons through percent change: • Percent Change=(Dataw/liftassist – Dataw/outliftassist)/ Dataw/outliftassist • Statistics: • A paired t-test with a confidence interval of 0.05 was performed 7 Experienced Operators Jackhammer Jackhammer w/ LA Muscle Activity Grip Pressure Grip Pressure Muscle Activity

  3. RESULTS/DISCUSSION * * ≈50% Up to 50% Lift assist reduces muscular effort of the operator * * *

  4. Questions?

  5. BIBLIOGRAPHY Bureau of Labor Statistics. (2013). Economic news release: Nonfatal occupational injuries and illnesses requiring days away from work. Killough, M., & Crumpton, L. (1996). International Journal of Industrial Ergonomics, 18(5), 399-405. LeMasters, G., Bhattacharya, A., Borton, E., & Mayfield, L. (2006). Experimental Aging Research, 32(2), 227-242. Snook, S., & Ciriello, V. (1991). Ergonomics, 34(9), 1197-1213.

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