This is a test of commonsense. Complete the next sentence:

How to exercise your back
Talk to your doctor.
Always talk to your doctor prior to making any changes to a workout or starting a new workout. This is especially important if you're recovering from an injury or have had a history of a back injury.
Always get clearance from your doctor before starting to work your back. Ask her when you can start exercise, what type of exercise, what resistance weight and if there are any other restrictions.