Double-Blind Intervention: Following completion of the baseline assessments, volunteers will be randomly assigned to one of two 12- week interventions; double-blind placebo injection or liraglutide for 12 weeks. Subjects will be started on a subcutaneous morning dose of 0.6 mg, and this will be titrated to 1.2 mg after one week, and then titrated to 1.8 mg after one week and they will remain on this dose for the duration of the study (see Table 1). Subjects will be thoroughly instructed on how to self-administer the subcutaneous injection.