For this study, a proposal of a 6-week intervention program will be carried out with lumbar stabilization exercises and clinical orientations, on 20 low back pregnant patients recruited by convenience and voluntaries from the community. Before intervention, all participantes will be evaluated by: electromoyography during three exercises, balance, and clinical outcomes such as pain, disability and psychological factors. All baseline testing and evaluation will be performed by a blinded evaluator to the study intervention.