The purpose was to examine the impact of an email intervention campaign to increase physical activity among women. Participants' activity levels were assessed at baseline, immediately following the intervention and one year post intervention. (N = 475) received weekly Walking Tips Intervention Emails (WTIE) for 6 weeks. Participants were primarily Caucasian, college-educated, middle-aged women with income greater than $60,000. Following the intervention a significant increase in weekly moderate intensity physical activity was found (37% [n = 75]; t = -2.743, p = 0.007). Post-intervention the percentage of participants who walked 5 or more days significantly increased (N = 103; t = -3.168, p = 0.002). Minutes of walking per day increased significantly (t = -2.114, p = 0.039) as well. The percentage of respondents reporting to exercise regularly for 6 months or more significantly increased. (Contains 2 tables.)