Maximum symmetric and asymmetric isoinertial lifting capabilities from floor to knuckle height

Abstract

Ten young male participants were recruited to test their maximum symmetric and asymmetric isoinertial lifting capabilities from floor to the knuckle height in different container dimensions varied in both width and length. The results showed that the order from the high-est to lowest lifting capability for the lifting modes was symmetric lifting, asymmetric lifting with leg rotation and asymmetric lifting with trunk rotation, and for the container dimensions was 50x35x15 cm, 70x35x15 cm and 50x50x15 cm. Participants' lifting capabilities differed significantly (p<0.05) among lifting modes and container dimensions. This study recommends that asymmetric lifting with leg rotation should be encouraged as compared with asymmetric lifting with trunk rotation when performing heavy asymmetric lifting tasks.