Phone apps aim to get women moving in underserved neighborhoods

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: Individuals eligible for this protocol have overweight or obesity (BMI \>= 25 kg/m\^2) African American women aged 21-75 years who live in Washington, DC Wards 5, 7, or 8 and neighboring areas of Prince George s County, MD. Eligible participants should also have access to a smartphone compatible with the mobile app for the protocol that they can use for the study. Eligible participants must be able to provide informed consent independently and also speak and read English at the 8th grade level. EXCLUSION CRITERIA: * Medical condition, including heart failure, recent unintentional weight loss or physical limitation, that might prohibit safe participation in physical activity for any reason * Heart disease as indicated by history of myocardial infarction in past 1 year, documented obstructive coronary artery disease on coronary angiography, coronary artery stent placement within the last year significant structural heart disease (e.g. hypertrophic or dilated cardiomyopathy with EF \<35%, severe valvular heart disease) with evidence of decompensation. * Pregnant women due to large hormonal changes during pregnancy that affect study variables and potential pregnancy-related restrictions on exercise. All participants of childbearing potential will need to self-report a negative pregnancy at the screening visit, baseline visit, and at the three-month and six-month visits, unless the participant self-reports being postmenopausal, having had a tubal ligation, or having undergone a complete hysterectomy. Pilot Study INCLUSION CRITERIA: * Must be an African-American female * Must be within the age of 21-75 years old * Must have overweight or obesity (Body Mass Index (BMI) \>= 25 kg/m\^2) * Must live in Washington DC Wards (5, 7, or 8) or live in Prince George s County, Maryland * Must have a smartphone that is compatible with the study software (mobile app) * Must be willing to use the software on personal smartphone for the study * Must be able to provide consent * Must be willing to wear the wrist-worn physical activity device for the study * Must not be pregnant Eligibility for Post-Menopausal Status for Sleep Sub-study: Eligibility is limited to post-menopausal women who have either completed or are currently enrolled in the main study. Confirmation of post-menopausal status will be determined by review of medical history prior to final eligibility assessment for the study. In patients with prior hysterectomy and retained ovaries, menopause cannot be diagnosed using menstrual criteria. Diagnosis will be made clinically based on age consistent with natural menopause ( \>=45) and the presence of menopausal symptoms, such as vasomotor or genitourinary symptoms. In addition to the Step it Up Study's exclusion criteria, during the screening visit, which can happen by telephone or telehealth, participants will be asked for certain conditions such as bilateral arm deformity, significant peripheral vascular disease, lymphedema, an arteriovenous (AV) fistula or graft in the monitoring arm, severe skin conditions or wounds at the cuff site, inability to tolerate cuff inflation, severe blood disorder or coagulopathy, and any other condition deemed unsafe at the discretion of the principal investigator. Additionally, participants will not be eligible for the optional Sleep Sub-study if: * they are unwilling or unable to be evaluated and followed as clinically indicated (examples might include participants with severe behavioral problems who refuse physical examination). * they do not have a primary healthcare provider or do not accept recommendations provided by study team for provider resources / referral networks. * they have a chronic or acute medical condition severe enough to interfere with overnight sleep study acquisition, such as a tracheotomy, uncontrolled seizure disorder, ventilator dependency, or history of stroke or major neurologic insult. * they work night shift. * they have started any new medications that modify sleep within the last two weeks. Optional MRI Tests Subjects will be screened for implanted metal objects or devices that may be incompatible with MRI (i.e. cerebral aneurysm clip, cochlear implant, pacemaker, etc.) These subjects will be eligible to proceed with study enrollment but will not undergo the optional MRI study.