Inclusion Criteria:
* To be eligible, prostate cancer survivors must self-identify as black or African American
* Prostate cancer survivors must have 0-III stage prostate cancer
* Prostate cancer survivors must have completed therapy (e.g., surgery, chemotherapy \[chemo\] and/or radiation)
* Prostate cancer survivors must enroll with a spouse or a romantic partner
* Prostate cancer survivors must not meet physical activity recommendation (i.e., 150 minutes of moderate intensity physical activity per week)
* Prostate cancer survivors must be willing and able to be physically active, as determined by responses to the Physical Activity Readiness Questionnaire (PAR-Q)
* Prostate cancer survivors must not participate in another physical activity, diet, or lifestyle program
* Prostate cancer survivors must have a valid home address and telephone number
* Prostate cancer survivors must be able to access internet over a smartphone or a computer at home or other location (e.g., work, church, library, community center, etc.)
* To be eligible, spouses or romantic partners must be \>=18 years of age
* Spouses or romantic partners must enroll with a spouse or a romantic partner with prostate cancer
* Spouses or romantic partners must live together with the survivors
* Spouses or romantic partners must not have major health problems (e.g., cancer, dementia, stroke, and heart and lung diseases)
* Spouses or romantic partners must be willing and able to be physically active, as determined by responses to the Physical Activity Readiness Questionnaire (PAR-Q)
* To be eligible, healthcare providers must be currently providing care with individuals diagnosed with prostate cancer
* Any professionals such as surgical and medical oncologists, fellows, nurse practitioners, physical assistants, and primary care physicians will be eligible
Exclusion Criteria:
* Prostate cancer survivors will be excluded if they are not married or partnered
* Prostate cancer survivors will be excluded if they have an active noncutaneous malignancy at any site
* Prostate cancer survivors will be excluded if they had a prior history of other cancer or have metastatic cancer
* Prostate cancer survivors will be excluded if they have planned concomitant immunotherapy, hormonal therapy, chemotherapy, or radiation therapy during the study period
* Prostate cancer survivors will be excluded if they are on active surveillance
* Prostate cancer survivors will be excluded if they enrolled in a protocol #: 2017-0556
* Prostate cancer survivors will be excluded if they are not able to understand and speak English
* Spouses or romantic partners who are not able to understand and speak English will be excluded
* Also, spouses or romantic partners who enrolled in a protocol (#2017-0556) will be excluded
* There are no exclusion criteria for healthcare providers