If there are surfaces that you should not be walking on, then this is best left to your doctor to decide. However, there are recommended exercises for Spinal Osteoarthritis which include:
Initial treatment may include losing weight if needed and then, for everyone, maintaining a healthy weight. It may also include exercise. Besides helping with weight management, exercise can also help:
Some of the exercises associated with osteoarthritis treatment include swimming, walking, and water aerobics. Exercise may be broken down into the following categories:
Hope this helps, any questions on exercise surfaces are best answered by your doctor.