Inclusion Criteria:

• Have been diagnosed with mild to moderate depression
• Are willing to take the antidepressant Lexapro
• Can access and use Email and the Internet
• Are willing and able to be physically active
• Access to a primary care physician

Exclusion Criteria:

Subjects will be excluded from participation for the following reasons:

• Pregnancy or breastfeeding
• Narrow angle glaucoma
• Any uncontrolled medical condition or any medical condition which would represent a contraindication to Escitalopram Oxalate Lexapro® pharmacotherapy. Any concomitant non-psychotropic medications that the physician determines are a contraindication to Escitalopram Oxalate Lexapro® pharmacotherapy Bipolar disorder, or any psychotic or organic mental disorder or dementia
• History of intolerance or allergy to Lexapro, or of prior failed treatment for depression with Lexapro
• Current substance abuse or dependency
• Current active suicidal ideation
• Current use of herbal psychoactive treatments such as St. John’s Wort
• Concurrent psychotropic medication is not permitted for 2 weeks prior to randomization (4 weeks in the case of fluoxetine) or at any point after
• Receipt of formal psychotherapy concurrently
• Inability, in the investigator’s opinion, to comply with study procedures or assessments
• Inability to exercise