We know very little of Fibromyalgia (FM) which is depicted by musculoskeletal pain, fatigue, depression, and hypocortisolism (decreased levels of cortisol). In this study Curtis, Osadchuk, & Katz (2011) recruited 22 participants to partake in a 75 minute yoga class (twice weekly, eight weeks).
Besides measuring cortisol levels, Curtis et. al (2011) handed out questionnaires pertaining to pain (intensity, unpleasantness, quality, sum of local areas of pain, catastrophizing, acceptance and disability), anxiety depression, and mindfulness. Participants were asked to fill out the questionnaire before, after 4 weeks and after the 8 week yoga class.