Inclusion Criteria:  Women ages 60 years or older diagnosed with breast cancer and women or men ages 60 years or older diagnosed with colon cancer within the last 5 years ≥ 3 months post-completion of last prescribed treatment (i.e., Chemotherapy, radiation therapy or surgery) Stages I-III (no stage 0 or metastatic cases will be included) Able to understand spoken and written instructions in English Participate in 60 minutes or more of MVPA (moderate to vigorous-intensity physical activity)/week for previous 6 months Have internet access or access to data sharing plan Willing to come to four Penn State Health visits over the course of a year, completing requested questionnaires Willing to use Garmin Vivofit device, participate in exercise coaching sessions and complete exercise logs between visits  Exclusion Criteria:  Prior respiratory, joint or cardiovascular problems precluding PA Metastatic disease Planned elective surgery during intervention/follow-up Exhibit gross cognitive impairment  We will not include any of the following vulnerable populations: adults unable to consent, individuals who are not yet adults, pregnant women, neonates, or prisoners.