Inclusion Criteria:  Female; ≥ 60 years of age Diagnosed with ovarian, fallopian tube or primary peritoneal cancer and undergoing planned neoadjuvant chemotherapy and are expecting to undergo planned surgery Fluent in spoken and written English Own a smartphone Have access to the internet to complete assessments  Exclusion Criteria:  Patients receiving planned chemotherapy only Patients with uncontrolled cardiovascular disease, who are non-ambulatory, or who have severe cognitive or functional limitations precluding their ability to participate in a physical activity intervention Pregnant women or prisoners Patients whose oncologist has not provided clearance for their participation