The type of study is a randomized controlled opened trial. The sample is composed of 34 women with age between 35 and 64 years and fibromyalgia diagnosis who will be divided into 2 groups: Aquatic Therapy Group (n=17) and Land-Based Therapy Group (n=17). This study will have two primary outcomes: Pain and balance. The intensity of pain will be assessed using the visual analog scale (VAS) and the pain threshold for each one of the 18 tender points will be assessed using a electronic algometer. Static balance will be evaluated with the Romberg's test and the dynamic balance with the Timed Up & Go test (TUG) and Berg Balance Scale. Both type of balance will be recorded in slow motion and then, will be analysed with a motion software. Secondary outcomes are: The impact of fibromyalgia on patient's lives, that will be measured with the "Revised Fibromyalgia Impact Questionnaire" (FIQR); the sleep quality, that will be assessed with the "Pittsburgh Sleep Quality Index" (PSQI); the fatigue, that will be evaluated witn the "Multidimensional Fatigue Inventory" (MFI); the physical capacity, that will be measured with the "six minute walk test" (SMWT) and confidence in balance that will be assessed with the "Activities-specific Balance Confidence" scale (ABC).