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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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Jackhammer BIOMECHANICAL ASSESSMENT OF A LIFT ASSIST DEVICE IN A JACKHAMMERING TASK Lift Assist
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
RESULTS/DISCUSSION * * ≈50% Up to 50% Lift assist reduces muscular effort of the operator * * *
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