Postural and trunk muscle response to sudden release during stoop lifting tasks before and after fatigue of the trunk erector muscles

An attempt made to study the effect of fatigue on the muscular and postural response to sudden release of different stoop lifting loads is presented. The duration of co-contraction appears to increase while fatigue of the trunk extensors does not appear to increase either the risk of fall or stumble or the incidence of co-contraction following sudden release of stoop lifting tasks.