This study will gather empirical evidence of the effectiveness of WOWii intervention in promoting changes in exercise behavior, fitness, and perceptions of exercise over the 16 week intervention as well as 2 months later for individuals living with SCI. The study staff will assess effectiveness by measuring participants (a) time spent each week doing aerobic exercise by self-report and objective monitoring, (b) aerobic capacity to assess fitness changes, and (c) self-reported perceptions of exercise barriers and self-efficacy at baseline, 4 months, and 6 months.