Previous research has shown that self-defense training can lead to gains in women's assertiveness, self-esteem, self-efficacy, and physical competence, and decreases in anxiety, helplessness, fear, and avoidant behaviors. However, most of this research has been conducted with healthy women who had not previously experienced physical or sexual violence. The investigators believe that women with such trauma histories require additional care because of potential triggering symptoms. As such, the investigators are mindful of the potential for triggering trauma symptoms and will work with the women so that they feel safe and comfortable in their participation. This pilot study aims to examine whether similar psychological gains from self-defense training are made in women who have previous experiences of physical and/or sexual violence.