EXERCISING TOGETHER for Couples Coping With Cancer

Inclusion Criteria: * SURVIVORS ONLY: * Histologically confirmed PC, BC or CRC without evidence of metastatic disease (confirmed by self-report on Health History Questionnaire. In the case a participant isn't able to confirm this criterion, a letter will be sent to his or her physician) * Three years or less from diagnosis date, by month and year, at time of enrollment (confirmed by self-report on Health History Questionnaire. In the case a participant isn't able to confirm this criterion, a letter will be sent to his or her physician) * Completed treatment (e.g., surgery, radiation and/or chemotherapy) \>= 6 weeks prior to enrollment. Concurrent adjuvant hormone therapy is permitted and must have been initiated \>= 6 weeks prior to enrollment. For prostate cancer, androgen deprivation therapy (ADT) may constitute primary treatment and must have been initiated \>= 6 weeks prior to enrollment. For breast cancer, hormone therapy may constitute primary treatment and must have been initiated \>= 6 weeks prior to enrollment. (confirmed by self-report on Health History Questionnaire. In the case a participant isn't able to confirm this criterion, a letter will be sent to his or her physician) * Co-residing with an intimate partner or spouse who is willing to participate (confirmed by self-report on Health History Questionnaire) * SURVIVORS AND SPOUSES/PARTNERS: * Underactive (\< 2 strength training sessions per week, lasting 30 minutes or more per session, at a moderate intensity …