The objective of this protocol is to adapt and pilot test an existing lifestyle modification intervention for weight loss for women with overweight or obesity who have had a recent false positive mammography screen. The purpose of this pilot trial is to establish feasibility of Connect Online to Engage Change Tool (CONECT) to promote weight loss through increased physical activity and diet change.

Inclusion Criteria:

1. Female
2. 40-65 years of age,
3. Received a negative mammography screening result in the previous four weeks
4. Moderately sedentary lifestyle (less than 120 minutes/week moderate intensity activity),
5. Answer "no" to all questions on the Physical Activity Readiness Questionnaire (PAR-Q).
6. BMI 25-40 kg/m2
7. Has access to a computer or mobile device with wireless internet
8. Able to speak and read English (language requirements are necessary because we cannot accommodate additional languages in prototype development phase.)

Exclusion Criteria:

1. Previous history or current diagnosis of breast cancer
2. Pregnancy or lactation
3. Involvement in a weight loss program
4. Major co-morbidities (e.g.,diabetes, hypertension, etc.)
5. History of disordered eating
6. Currently taking medication that may impact weight (e.g., synthroid, metformin)