Subjects will be allocated randomly in three groups: (1) Traditional Pilates group, which will perform only exercises based on the traditional Pilates method, (2) Modified Pilates group, which will perform exercises based on the Pilates method alternated with active rest periods on treadmill ergometer, (3) Control group: will not perform any physical exercise during the trial period. The sessions will be performed two times a week, during 16 weeks. Subjects will be evaluated before and after 16 weeks of intervention.