I know there is (somewhat) widespread agreement that relaxation techniques can be used as a form of avoidance of exposure in panic disorder, and hence breathing techniques and progressive muscle relaxation are discouraged so that the client feels the full physiological activation and becomes aware that the symptoms that he/she experiences are not actually dangerous or life-threatening in any way.
However, I was wondering whether this would apply as well to exposures in other forms of anxiety, say, specific phobia or social phobia. In those instances, it seems to me that the exposure to the phobic stimulus is not prevented by the relaxation/breathing techniques, and so these techniques would be merely an aid to facilitate the exposure. The client would not habituate to the physiological activation (which would be dampened by the relaxation techniques), but he/she could still dispel his/her irrational beliefs about coming into contact with the feared object.
Any science to back this up?
Cheers!