1. Diabetes Outcomes. Based on the investigators' pilot data, mean glycemic control (as measured by HbA1c) is expected to improve .4% in participants in the EXER and CBT+EXER treatment conditions at POST compared to baseline [de Groot et al 2009]. Participants assigned to the CBT+EXER treatment are expected to show the greatest improvement in HbA1c followed by those in the EXER group in comparison to the CBT group. No improvement is expected among those assigned to the UC condition.