If you can see hollow areas right in front of the shoulders, on the neck, it is likely that the serratus muscles of the neck are not functioning properly. Unlike other muscles that get tight and need to be loosened, the cervical serratus muscles tend to become flabby and do not contract as they should. The serratus muscles of the neck are like fingers that attach to these vertebrae: C4, C5, C6, C7. When they are toned they help arch the neck, bend, and lift the forehand.
Sports massage is a fast and easy solution to the problem of serratus muscles that are not contracting efficiently.