Effects of Yoga Thai massage and conventional stretching in women with low back pain

INTERVENTION: Massage Muscle Stretching Exercises Other Participants will be randomized into three groups: Yoga Thai massage (8 participants), conventional stretching (8 participants) and control group (8 participants). In the treatment groups, Yoga Thai massage and conventional stretching, interventions will be performed for 30 minutes, once a week for 4 weeks. For the Yoga Thai massage, a protocol of specific movements for the condition of low back pain will be elaborated, as well as the conventional stretching will be directed to the main muscle groups affected in the condition. During this period the control group will perform the usual daily activities. CONDITION: Low Back Pain Low Back Pain ; Low Back Pain PRIMARY OUTCOME: Improvement in functionality, assessed by the Owestry questionnaire, based on the finding of a decrease in the questionnaire's score, in the evaluations before and after the intervention Increased flexibility, assessed by the third finger to the ground test, Stibor test, modified Schober test, Wells bench, popliteal angle test and Thomas test, based on the increase, in centimeters of linear tests and degrees of angular tests, in the measurements before and after the intervention Pain improvement, assessed by the Visual Numerical Pain Scale, based on the decrease in the number on the scale in the measurements before and after the intervention SECONDARY OUTCOME: Improvement in quality of life, measured by the SF‐36 questionnaire, based on the verification of the decrease in the questionnaire's score, in the evaluations before and after the intervention INCLUSION CRITERIA: Women between 20 and 40 years old; They must have complaints of nonspecific low back pain for more than 1 month; Do not practice any physical activity that favors the improvement of low back pain and / or flexibility (yoga, pilates, stretching classes); Accept to be part of the research by signing the free and informed consent form.