**5. Conclusions**

In summary, our findings lend initial evidence that a virtually delivered multicomponent PA intervention that includes exergame group play, PA behavioral coaching, and BC support is feasible and acceptable to older BC survivors regardless of their current treatment status. Additionally, our exploratory findings indicate potential physical function benefits in BC survivors, and consequently, a potential reduction in mortality of the Pink Warrior 2 intervention. However, our initial findings will need to be verified in a larger study. Using such technology can help overcome some of the limitations to PA program access experienced by older adults [37]. Additionally, we contributed to the accumulating evidence indicating that objective physical function measures can be conducted among a population with lower physical function level [30,31]. Future study is warranted to determine the effect of exergame- and group-based PA on physical function in survivors of BC. We also need to explore how to integrate the use of exergame and PA behavior coaching into cancer support groups to extend the reach of evidence-based PA programs to the wider population of cancer survivors. Lastly, our study findings can be used as initial evidence for future studies to explore its application in the clinical setting, and we can take the approach we have used in the current study to develop for use in other populations and diseases.

**Supplementary Materials:** The following supporting information can be downloaded at: https: //www.mdpi.com/article/10.3390/life13020574/s1, Table S1: Detailed descriptions of how the SPPB, TUG, and 2-min step test were conducted virtually; Table S2: Participants' written feedback regarding the Pink Warrior 2 and the support programs; Table S3: Acceptability of the Pink Warrior 2 intervention (time 2; n = 10); Table S4: Acceptability of the UTMB support group program (time 2; n = 7); Table S5: Consort 2010 checklist of information for reporting a pilot or feasibility trial.

**Author Contributions:** Conceptualization, M.C.S.; methodology, M.C.S., U.C., Z.H.L. and E.J.L.; formal analysis, M.C.S., M.C.R. and M.D.S.; investigation, M.C.S., U.C., S.J.W., E.M., H.C.S. and E.J.L.; resources, M.C.S. and E.J.L.; data curation, M.C.S., S.J.W., E.M. and U.C.; writing—original draft preparation, M.C.S., M.C.R. and M.D.S.; writing—review and editing, U.C., S.J.W., J.B., Z.H.L., E.M. and H.C.S.; visualization, M.C.S. and S.J.W.; supervision, M.C.S. and E.J.L.; project administration, M.C.S., S.J.W. and E.M.; funding acquisition, M.C.S. and E.J.L. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the UTMB Claude D. Pepper Older Americans Independence Center NIH grant (P30 AG024832, PI: E. Volpi). Salary support provided, in part, by a Cancer Center Support Grant (CA16672, PI: P. Pisters, MDACC), from the NCI/NIH.

**Institutional Review Board Statement:** The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of University of Texas Medical Branch (protocol code 16-0040-02 and approved on 7 May 2020) for studies involving humans.

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** Requests for data may be sent to the corresponding author. Data would be made available following the University of Texas Medical Branch Data Sharing Policy.

**Acknowledgments:** The authors would like to thank the following individuals for their assistance with participant recruitment, data collection, and data management: Jason Bentley, V Suzanne Klimberg, Sandra Hatch, Bryan Tutt provided editorial support.

**Conflicts of Interest:** The authors declare no conflict of interest.
