Yes and no. Physical activity has been shown to maintain good health and prevent injuries. Using proper lifting techniques and setting up your workspace to prevent back problems are also important. The physical therapist can help you in both of these areas.
The specific exercises prescribed by a physical therapist during the early weeks after an injury are usually changed or modified over time. The therapist will progress the exercises as your symptoms improve. New exercises will be added to strengthen the muscles that move and hold the back and upper body.
When your symptoms are gone and you’ve started increasing daily activities, the therapist will help you begin (or restart) a regular exercise program. This may include a few exercises to maintain the back posture and strength you have gained during therapy for your injury.