The purpose of this study is to investigate the effects of a functional exercise program associated with Low Level Laser Therapy (LLLT) on pain, functional capacity and quality of life of individuals with fibromyalgia. Half of participants will receive functional exercise and LLLT, while the other half will receive functional exercise and placebo LLLT.

Inclusion Criteria:

• being female;
• age between 30 and 50 years;
• have an ovulatory cycle;
• height between 1.50m and 1.80m, body mass between 50 and 80 kg and BMI in the range of 18.5 to 29.9 kg / m2;
• present a clinical diagnosis of fibromyalgia, signed by a rheumatologist according to the current criteria of the American College of Rheumatology;
• is at least 6 months without any physical exercise;
• do not present musculoskeletal conditions that prevent them from performing the evaluation and proposed physical activity, except FM;
• not having diabetes mellitus and uncontrolled blood pressure;
• they do not present an inflammatory rheumatic condition or serious cardiovascular and / or pulmonary disease that prevents them from performing the evaluation and the proposed physical activity;
• Not having psychiatric illness or having malignant tumors;
• is not pregnant
• did not present dengue, zika or chikungunya in the last year;
• and finally not to be hypersensitive to light.

Exclusion Criteria:

• not attend for more than two consecutive exercise sessions
• at any time and for any reason expressing an intention to leave the study
• present a health problem that prevents them from continuing to carry out the proposed exercises