The aim of this study is to evaluate the effectiveness of an intervention with sessions of 3 minutes of whole body cryotherapy (WBC) in the Cryosense cabin. Measurement period time: 8 weeks.

The aim of this study is to evaluate the effectiveness of an intervention with sessions of 3 minutes of whole body cryotherapy (WBC) in the Cryosense cabin, on the main clinical manifestations of patients with Fibromyalgia (FM).

A randomized, open and crossed 8-week clinical trial comparing a WBC intervention with the waiting list control group. Patients diagnosed with FM according to ACR 2010 criteria, in treatment and regular follow-up recruited consecutively. Two groups were made, one of intervention and one of waiting list which served as control during the first phase. At the end of the first phase, and after a week of washout, the groups crossed and went on to carry out the second phase following the opposite intervention. The pharmacological treatment was not modified during the entire study.

Trial endpoints were changed in pain after 2 and 4 weeks, measured by a visual analogue scale (VAS) and burden of disease, evaluated by the Fibromyalgia Impact Questionnaire(FIQ).

Inclusion Criteria:

• Age between 25 and 80 years old
• Diagnosis of Fibromyalgia according to ACR criteria
• More than 1 year from diagnosis
• Lack of response or partial response to previous treatment
• In case of women,commitment not to get pregnant during the study.

Exclusion Criteria:

• Patiens with cardiovascular or psychiatric comorbidity
• Cold intolerance
• Changes in pharmacological treatment during the study
• Body temperature over 37,5ºC