- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
This paper investigates the relationship between low back loading (force) and knee loading (force) during manual materials lifting activities by biomechanical modeling. Improper loading on L5/S1 joint and knee joint can result in low back pain and knee arthritis. A six link two dimensional sagittal plane biomechanical model based has been used here to find out the Compressive, Shear and resultant forces on both the joints for various combinations of body angles describing the posture permitted by the body balance condition. A statistical analysis of these data revels that low back and knee forces are inversely correlated and the correlations are very high and significant. The variations of these correlations with load height and load weight were also found out. Effect of increase of body weight, which normally happens with ageing, was also considered. Finally the paper provides recommendations for the body posture for manual materials lifting activities.