Write a summary and discover the Psychological Theory that coincides with the to

Write a summary and discover the Psychological Theory that coincides with the topic Relaxation. 
A comprehensive summary of the background, theory, and application of the technique. It should be a minimum of 1300 words.
*12-pt font, double spaced, no first person, no contractions, appropriate APA style in-text citations, & an APA style reference page