Demonstration with standby supervision is required when the person has had any medical problem that has secondary consequences, e.g. hip and knee replacements, unhealed fractures. They are not apt to comprehend the consequences, nor are they apt to follow precautions due to impulsivity.
ACL 5.0 - 5.2
Range of motion exercises maybe followed from a demonstration.
Someone will need to count with them and correct improper positioning.