I've done some water exercise. One of the benefits is your head can be supported by floatation so you can relax your neck muscles. This may allow the neck to decrease any inflammation. The low impact twisting of the neck and upper spine may also help with cervical spine issues.

The low impact exercise can be good. I did lunging. I would lunge (walk with strong leg pushing) the length of the pool for almost an hour. I did almost 50 25m lengths in 45 to 50 minutes. That is about 3/4's of a mile.

Unfortunately, access to the gym and pool is no longer included in my health care plan. I have not tried the new pool that is much farther away.