Lumbosacral loads in bedmaking.
The purpose of this study was to determine whether the introduction of larger and heavier beds which were lower to the floor increased the physical stress on employees responsible for room cleaning and bedmaking in the hospitality industry. More specifically, this study assessed the effect of bed size (single, double and king) and bed height (460 and 560 mm) on dynamic and static estimates of L5/S1 compression force and static L5/S1 shear force for six simulated components of the overall bedmaking task. Results confirmed the view that static models severely underestimate the loads on the lumbar spine under inertial lifting conditions, and also indicated that: (i) tasks with the greatest hand loads were not necessarily associated with the greatest spinal loads due to differences in the way each task was performed; (ii) L5/S1 loads produced during bedmaking may exceed recommended safe lifting limits for certain task-size height combinations; and (iii) the use of larger and heavier beds in the hospitality industry imposes increased loads on the lumbar spine. The investigation of alternative work practices designed to minimise loads on the lumbar spine is recommended.
D000328:Adult; D001513:Beds; D001696:Biomechanical Phenomena; D004867:Equipment Design; D006804:Ergonomics; D005260:Female; D006796:Household Work; D006801:Humans; D017770:Lifting / Q000009:adverse effects; D017116:Low Back Pain / Q000209:etiology / Q000517:prevention & control; D008159:Lumbar Vertebrae / Q000502:physiology*; D008875:Middle Aged; D012447:Sacrum / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*