One more thing to keep in mind.
Relaxation therapy is acomplementary medical techniquenot recognized or regualted by the medical establishment. Do you have any idea if the people who are offering this course are competent?
Here is a quote from Aetna life’s site
Relaxation Therapy
Before engaging in any complementary medical technique, you should be aware that many of these techniques have not been evaluated in scientific studies. Often, only limited information is available about their safety and effectiveness. Each state and each discipline has its own rules about whether practitioners are required to be professionally licensed. If you plan to visit a practitioner, it is recommended that you choose one who is licensed by a recognized national organization and who abides by the organization’s standards. It is always best to speak with your primary health care provider before starting any new therapeutic technique.
http://www.intelihealth.com/IH/ihtIH/WSIHw000/8513/34968/358865.html?d=dmtContent