They should work together to make sure the work activity is properly assessed. Your employer should find ways of changing the way the work is done to control the risk of injury. This is covered by the employer's duty of care under the Act. You can do something about the object that is being moved or the design of the workplace or the way the work is organised. Often a combination of these changes will be necessary.
Training is part of all risk control.
Other points to consider when controlling risk are explained in the Code of Practice for Manual Handling . Our workers have been shown how to lift correctly. Knowing how to lift correctly will not be enough if there is a problem with the object, the workplace design or the way the work is organised. Manual handling training should help the workers understand how to prevent injuries by proper hazard identification, risk assessment and control. Specific training in the best way to go about the job should be provided when the other changes have been made.