Inclusion Criteria:  Stage I - III breast cancer patients who are treated with curative intent Completed primary treatment, including surgery, radiation therapy and/or chemotherapy Currently receiving adjuvant endocrine therapy (Tamoxifen or an Aromatase Inhibitor) for at least 3 months (to allow for acclimatization) and within 3-years of of staring endocrine therapy. Can read and speak English Has access to a tablet, smartphone, laptop or computer with built-in video camera  Exclusion Criteria:  Not currently receiving endocrine therapy or scheduled to stop within 6 months Diagnosed with stage IV breast cancer Not willing to attend a twice-weekly exercise program virtually for the duration of the study. Not willing to comply with safety measures of virtual programming (to be seen on camera and monitored via video by the instructor)