Resources about relaxation training as used in CBT I’m looking for resources about the relaxation training component of CBT. I had a professor who spent a good deal of time on it in class, but I’m no longer attending that school and he’s notoriously unresponsive to email. I’m looking for anything about the technique as used in cognitive-behavioral therapy.

Our professor did mention The Relaxation Response, a book published in the ‘70s, was the basis for the type he was teaching about.
As I mentioned previously in the comments, there are a wide range of relaxation techniques which can be used within CBT.  Having not read the book mentioned, I looked it up and found how the relaxation technique was described in the book.

From this I can tell you that the technique you have been taught is called Progressive Muscle Relaxation [PMR] (McCallie, Blum, &amp; Hood, 2006).

PMR involves the process of feeling the muscles in your body relax starting from one end of the body to the other, noticing the difference in sensation whilst also listening to your slow deep breathing.

You can obtain plenty of free or paid for PMR scripts (also known as screeds) through searching on Google.

References

McCallie, M. S., Blum, C. M., &amp; Hood, C. J. (2006). Progressive muscle relaxation. Journal of Human Behavior in the Social Environment, 13(3), 51-66.DOI: 10.1300/J137v13n03_04