Final answer:
Recent surgery, acute injury, fever; chronic pain, anxiety, muscle soreness; athlete recovery, relaxation, joint flexibility are situations in which a back rub would be contraindicated.
Step-by-step explanation:
Three situations in which a back rub would be contraindicated are:
Recent surgery, acute injury, fever
Chronic pain, anxiety, muscle soreness
Athlete recovery, relaxation, joint flexibility
In situation b), a back rub would be contraindicated as it can result in further harm to someone who has recently had surgery, an acute injury, or is experiencing a fever. In situation c), someone with chronic pain, anxiety, or muscle soreness may find a back rub to be aggravating rather than helpful. In situation d), an athlete who is recovering, seeking relaxation, or improving joint flexibility may benefit from a back rub, not find it contraindicated.