This study will recruit 70 women who are high risk for prenatal cannabis use for a 12-week program of either using a Fitbit activity tracker or using the tracker and receiving a Lifestyle Physical Activity program. The primary outcomes will be self reported percent days of cannabis use and physical activity. Secondary outcomes include self -reported measures of depression and anxiety symptoms, adaptive coping, and self-efficacy for cannabis abstinence.
This NIH funded study will enroll 20 pregnant women in an Open Trial and 50 pregnant women in an RCT who are at high risk for prenatal cannabis use. Participants will be assigned to either: (1) a 12-week Lifestyle Physical Activity plus Fitbit (LPA+Fitbit) intervention or (2) a Fitbit Only condition. The investigators will clinically monitor all participants in the study for safety and clinical deterioration, and measure a variety of symptom outcomes over the course of the intervention period during pregnancy, as well as at a postpartum follow-up.