The effects of container size, frequency and extended horizontal reach on maximum acceptable weights of lifting for female industrial workers

Gender differences in psychophysically determined maximum acceptable weights and forces for industrial workers observed after twenty years

“…Frequency was significant in this experiment and has been a significant factor in all of our previous papers for both males and females (Snook 1971;Ciriello and Snook 1983;Ciriello et al 1990Ciriello et al , 2008Ciriello 2003Ciriello , 2007. The results on the effects of heights on lifting and lowering were similar to earlier studies, which reported no height effects for males and females (Snook 1971;Ciriello 2001Ciriello , 2005Ciriello et al 1993Ciriello et al , 2008, but contrary to other studies which found significant height effects for males and females (Ciriello and Snook 1983;Ciriello et al 1990;Snook and Ciriello 1974).…”

A psychophysical study of high-frequency arm lifting

“…They noted that high and very high frequency manual handling tasks are routinely performed in the package sorting and trucking industry which often involves bouts of work during the work day. Ciriello (2003Ciriello ( , 2007 investigated the effects of high frequency (20 lifts/min) on MAWL and noted that the 20 lifts/ min frequency had not been previously studied in the Liberty Mutual laboratories. He further noted that while their surveys had seldom encountered a frequency that high in industry, it was still relevant to jobs such as the loading and off-loading from conveyors.…”

The effects of horizontal load speed and lifting frequency on lifting technique and biomechanics

“…Participant-dependent factors such as lifting technique (Hsiang et al 1997, Kingma et al 2004, lifting experience (Chany et al 2006, Marras et al 2006, gender (Marras et al 2003) and obesity (Xu et al 2008) can significantly impact lifting kinematics and therefore may affect LBD risk. Likewise, task-dependent factors including load magnitude (Lavender et al 2003), load size and stability (Marras et al 1999, Lee and Lee 2002, Ciriello 2007, coupling character of load , lifting origin and destination (Lavender et al 2003, Davis andMarras 2005), lifting speed (Lavender et al 1999, Lin et al 1999, lifting frequency (Hagen et al 1995) and ground surface characteristics (Jiang et al 2005, Matthews et al 2007, Faber et al 2008 have been shown to alter trunk kinematic patterns and influence the risk of LBP. One task-related characteristic that has not been explored relative to lifting kinematics/biomechanics is the effect of horizontal load speed.…”