A Community Dance Intervention Engaging Breast Cancer Survivors in a Middle-income Country

Breast Cancer Clinical Trial

Official title:

"My Body, My Rhythm, My Voice": a Community Dance Intervention Engaging Breast Cancer Survivors in Physical Activity in a Middle-income Country

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT05252780
• Other study ID #: P20CA217199-9492018
• Secondary ID: P20CA217199
• Status: Completed
• Phase: N/A
• Start date: March 1, 2019
• Est. completion date: August 31, 2020

Study information

• Verified date: February 2022
• Source: University of Los Andes, Columbia
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Interventions to promote physical activity among women breast cancer survivors (BCS) in low to middle-income countries are limited. We conducted a study to assess the acceptability and preliminary effectiveness of an 8-week, 3 times/week group dance intervention for BCS delivered in Bogotá, Colombia. The effect of the intervention on participants' physical activity levels, motivation to engage in physical activity, and quality of life were evaluated, and interviews were thematically analyzed to assess program acceptability.

Description:

This is a quasi-experimental study with a control group and an intervention group. The study population are patients over 18 years of age with a diagnosis of breast cancer who have received management and are currently in remission phase (more than 1 year after finishing management with chemotherapy and radiotherapy) and who do not report having any medical contraindication for the practice of physical activity (angina, acute myocardial infarction, pulmonary embolism, arterial hypertension and uncontrolled diabetes mellitus, severe lymphedema). The control group will be patients who attend their medical check-ups at the National Cancer Institute of Colombia and the intervention group will be patients who are cared for by units of the Bogotá's medical service. It will have the written approval of the ethics committee of the respective hospitals. Being an exploratory study that investigates the acceptability and main motivations for attending physical activity sessions on a regular basis, it is considered that a sample of 30 people in the control group and 30 people in the intervention group could provide the necessary information to have in mind to develop studies with more significant sample sizes in the future. For 8 weeks the intervention group will be offered 24 classes of musicalized directed physical activity (through a training protocol adapted for patients with this underlying pathology), and 8 craft workshops, to be held in the same space as the physical activity sessions. Additionally, at the same time, healthy habits will be promoted with the control group through text messages during 8 weeks, with a two workshops (at the beginning and the end of this period). The classes and workshops will be held at the facilities of the health provider institution in a place that guarantees the privacy of the participants. For the recruitment of patients in the intervention group, women who were diagnosed with altered BI-RADS will be contacted by telephone. For the recruitment of patients from the control group, the head nurse who coordinates the follow-up program for breast cancer patients will be asked to invite the women in the study to participate. Additionally, all invited patients will receive the information through an attached information sheet. Before the start of the intervention and after it, the following measurements will be made: 1. The questionnaires include questions about sociodemographic data, medical information, quality of life, general state of health, optimism and pessimism about life, anxiety and depression, perception of fatigue, knowledge about physical activity, self-efficacy in physical activity and social support for the practice of physical activity. These questionnaires will be administered by pollsters trained and registered through the Qualtrics application. These questionnaires will be applied by trained interviewers in a personal meeting in both health centers, in a space that ensures the confidentiality and security of the information. 2. Objective measurements that include levels of physical activity by accelerometry and body composition by bio-impedance. These measurements will be carried out by a professional in Respiratory Therapy in the facilities of the institution that provides services where the women have been recruited, as appropriate control group or intervention group. The research team will provide the transportation service to take the participants to the facilities. To guarantee the physical safety of the people who participate, there will be a person certified in life support, who will ensure that the participant who requires entering in the most efficient way to the health system. It is worth clarifying that all study participants will have affiliation to a Health Promoting Entity through which they attend their oncology controls, and additionally, the research group will have a medical insurance policy for the patients who participate in the intervention to cover any event that may arise during it. 3. Collection of qualitative information through focus groups led by an anthropology professional to explore what breast cancer survivors look for in a physical activity program and the main motivations and barriers to attending said program and its acceptability. In addition, information will be collected through interviews with experts who work in health promotion, disease prevention, and cancer patient management to identify those factors that are important to be able to articulate the recreation sector with the health sector in the implementation of a targeted physical activity program for breast cancer survivors. Approximately 10 to 15 interviews will be carried out according to the saturation of the information; the recruitment of these experts will be done through snowball sampling where an expert will refer to contacts related to this topic. Statistical analyzes will be carried out with SPSS and SAS, an ANOVA analysis of variance, Kruskal-Wallis and McNemar's tests of repeated measures will be carried out to establish the change in the results before and after the intervention. To support the analysis of qualitative data from both the focus groups and the interviews, the NVIVO12 software will be used. Participants will receive the aggregated results of the general study ensuring confidentiality. Additionally, the participants will receive individually the results of the anthropometric tests and stress tests so that they know their physical condition; those who find a level of risk of coronary heart disease will be explicitly suggested to consult a specialist doctor through their insurer.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 64
• Est. completion date: August 31, 2020
• Est. primary completion date: November 30, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• BCS at least six months post treatment completion
• More than 18 years of age
• Living in Bogotá
• Willing to attend the program and the assessments

Exclusion Criteria:

• The presence of metastatic disease and other health conditions for which community physical activity was contraindicated

Related Conditions & MeSH terms

• Breast Cancer
• Breast Neoplasms
• Physical Inactivity

Intervention

Behavioral:
• My Body, My Rhythm, My Voice
My Body was a behavioral intervention informed by the social cognitive and self-determination theories. Based on the discussions and a systematic review of the literature, we designed the 8-week, 3 times/week rumba physical activity intervention. The goal of the intervention was to gradually increase all participants' physical activity levels to achieve significant health benefits. As part of the physical activity intervention, participants were also taught by their instructor during each class how to utilize behavioral and cognitive self-regulatory skills to increase and maintain their physical activity participation. Examples of such skills were action planning, coping planning, counter conditioning, self-evaluation, among others.

Locations

Country	Name	City	State
Colombia	School of Medicine, Universidad de los Andes	Bogotá

Sponsors (8)

Lead Sponsor	Collaborator
Olga Lucia Sarmiento	Hospital de San Jose, National Cancer Institute (NCI), National Institutes of Health (NIH), Pontificia Universidad Javeriana, Stanford University, Universidad Manuela Beltrán, University of California, Los Angeles

Country where clinical trial is conducted

Colombia, 

References & Publications (57)

Allemani C, Matsuda T, Di Carlo V, Harewood R, Matz M, Nikšic M, Bonaventure A, Valkov M, Johnson CJ, Estève J, Ogunbiyi OJ, Azevedo E Silva G, Chen WQ, Eser S, Engholm G, Stiller CA, Monnereau A, Woods RR, Visser O, Lim GH, Aitken J, Weir HK, Coleman MP; CONCORD Working Group. Global surveillance of trends in cancer survival 2000-14 (CONCORD-3): analysis of individual records for 37 513 025 patients diagnosed with one of 18 cancers from 322 population-based registries in 71 countries. Lancet. 2018 Mar 17;391(10125):1023-1075. doi: 10.1016/S0140-6736(17)33326-3. Epub 2018 Jan 31. — View Citation

American College of Sports Medicine. ACSM's Guidelines For Exercise Testing And Prescription (10th Edition). 10th ed. (Kluwer W, ed.).; 2018.

American Collegue of Sports Medicine. ACSM's Guidelines For Exercise Testing And Prescription (10th Edition).; 2018.

Balneaves LG, Van Patten C, Truant TL, Kelly MT, Neil SE, Campbell KL. Breast cancer survivors' perspectives on a weight loss and physical activity lifestyle intervention. Support Care Cancer. 2014 Aug;22(8):2057-65. doi: 10.1007/s00520-014-2185-4. Epub 2014 Mar 15. — View Citation

Basen-Engquist K, Alfano CM, Maitin-Shepard M, Thomson CA, Schmitz KH, Pinto BM, Stein K, Zucker DS, Syrjala KL, Fallon E, Doyle C, Demark-Wahnefried W. Agenda for Translating Physical Activity, Nutrition, and Weight Management Interventions for Cancer Survivors into Clinical and Community Practice. Obesity (Silver Spring). 2017 Nov;25 Suppl 2:S9-S22. doi: 10.1002/oby.22031. — View Citation

Battaglini CL, Mills RC, Phillips BL, Lee JT, Story CE, Nascimento MG, Hackney AC. Twenty-five years of research on the effects of exercise training in breast cancer survivors: A systematic review of the literature. World J Clin Oncol. 2014 May 10;5(2):177-90. doi: 10.5306/wjco.v5.i2.177. — View Citation

Boing L, Baptista F, Pereira GS, Sperandio FF, Moratelli J, Cardoso AA, Borgatto AF, de Azevedo Guimarães AC. Benefits of belly dance on quality of life, fatigue, and depressive symptoms in women with breast cancer - A pilot study of a non-randomised clinical trial. J Bodyw Mov Ther. 2018 Apr;22(2):460-466. doi: 10.1016/j.jbmt.2017.10.003. Epub 2017 Oct 12. — View Citation

Bray F, Ferlay J, Soerjomataram I, Siegel RL, Torre LA, Jemal A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin. 2018 Nov;68(6):394-424. doi: 10.3322/caac.21492. Epub 2018 Sep 12. Erratum in: CA Cancer J Clin. 2020 Jul;70(4):313. — View Citation

Brunet J, Burke SM, Sabiston CM. The benefits of being self-determined in promoting physical activity and affective well-being among women recently treated for breast cancer. Psychooncology. 2013 Oct;22(10):2245-52. doi: 10.1002/pon.3287. Epub 2013 Apr 18. — View Citation

Caperchione CM, Sabiston CM, Stolp S, Bottorff JL, Campbell KL, Eves ND, Ellard SL, Gotay C, Sharp P, Pullen T, Fitzpatrick KM. A preliminary trial examining a 'real world' approach for increasing physical activity among breast cancer survivors: findings from project MOVE. BMC Cancer. 2019 Mar 27;19(1):272. doi: 10.1186/s12885-019-5470-2. — View Citation

Carey RN, Connell LE, Johnston M, Rothman AJ, de Bruin M, Kelly MP, Michie S. Behavior Change Techniques and Their Mechanisms of Action: A Synthesis of Links Described in Published Intervention Literature. Ann Behav Med. 2019 Jul 17;53(8):693-707. doi: 10.1093/abm/kay078. Review. — View Citation

Cerulli C, Parisi A, Sacchetti M, et al. Dancing with health: A new dance protocol to improve the quality of life of breast cancer survivors. Med dello Sport. 2019;72(2):295-304. doi:10.23736/S0025-7826.19.03530-0

Coletta AM, Marquez G, Thomas P, Thoman W, Bevers T, Brewster AM, Hawk E, Basen-Engquist K, Gilchrist SC. Clinical factors associated with adherence to aerobic and resistance physical activity guidelines among cancer prevention patients and survivors. PLoS One. 2019 Aug 1;14(8):e0220814. doi: 10.1371/journal.pone.0220814. eCollection 2019. — View Citation

Daley AJ, Crank H, Saxton JM, Mutrie N, Coleman R, Roalfe A. Randomized trial of exercise therapy in women treated for breast cancer. J Clin Oncol. 2007 May 1;25(13):1713-21. — View Citation

Department of Health & Human Services. 2018 Physical Activity Guidelines Advisory Committee Scientific Report.; 2018.

Díaz Del Castillo A, González SA, Ríos AP, Páez DC, Torres A, Díaz MP, Pratt M, Sarmiento OL. Start small, dream big: Experiences of physical activity in public spaces in Colombia. Prev Med. 2017 Oct;103S:S41-S50. doi: 10.1016/j.ypmed.2016.08.028. Epub 2016 Aug 26. — View Citation

Emslie C, Whyte F, Campbell A, Mutrie N, Lee L, Ritchie D, Kearney N. 'I wouldn't have been interested in just sitting round a table talking about cancer'; exploring the experiences of women with breast cancer in a group exercise trial. Health Educ Res. 2007 Dec;22(6):827-38. Epub 2007 Jan 31. — View Citation

Errico KM, Rowden D. Experiences of breast cancer survivor-advocates and advocates in countries with limited resources: a shared journey in breast cancer advocacy. Breast J. 2006 Jan-Feb;12 Suppl 1:S111-6. — View Citation

Finck C, Barradas S, Singer S, Zenger M, Hinz A. Health-related quality of life in Colombia: reference values of the EORTC QLQ-C30. Eur J Cancer Care (Engl). 2012 Nov;21(6):829-36. doi: 10.1111/ecc.12000. Epub 2012 Sep 12. — View Citation

Finck C, Barradas S, Zenger M, Hinz A. Quality of life in breast cancer patients: Associations with optimism and social support. Int J Clin Health Psychol. 2018 Jan-Apr;18(1):27-34. doi: 10.1016/j.ijchp.2017.11.002. Epub 2017 Dec 9. — View Citation

Finne E, Glausch M, Exner AK, Sauzet O, Stölzel F, Seidel N. Behavior change techniques for increasing physical activity in cancer survivors: a systematic review and meta-analysis of randomized controlled trials. Cancer Manag Res. 2018 Oct 30;10:5125-5143. doi: 10.2147/CMAR.S170064. eCollection 2018. — View Citation

Fong AJ, Jones JM, Faulkner G, Sabiston CM. Exploring cancer centres for physical activity and sedentary behaviour support for breast cancer survivors. Curr Oncol. 2018 Oct;25(5):e365-e372. doi: 10.3747/co.25.3858. Epub 2018 Oct 31. — View Citation

Freedson PS, Melanson E, Sirard J. Calibration of the Computer Science and Applications, Inc. accelerometer. Med Sci Sports Exerc. 1998 May;30(5):777-81. — View Citation

Gaffney LK, Lozano OD, Almanza A, Ruiz N, Mantero A, Stoutenberg M. The Implementation of a National Physical Activity Intervention in Colombia. J Phys Act Health. 2019 Jun 1;16(6):430-436. doi: 10.1123/jpah.2018-0183. Epub 2019 May 19. — View Citation

GBD 2017 Causes of Death Collaborators. Global, regional, and national age-sex-specific mortality for 282 causes of death in 195 countries and territories, 1980-2017: a systematic analysis for the Global Burden of Disease Study 2017. Lancet. 2018 Nov 10;392(10159):1736-1788. doi: 10.1016/S0140-6736(18)32203-7. Epub 2018 Nov 8. Erratum in: Lancet. 2019 Jun 22;393(10190):e44. Lancet. 2018 Nov 17;392(10160):2170. — View Citation

González-Cutre D, Sicilia Á, Fernández A. [Toward a deeper understanding of motivation towards exercise: measurement of integrated regulation in the Spanish context]. Psicothema. 2010 Nov;22(4):841-7. Spanish. — View Citation

Grimmett C, Corbett T, Brunet J, Shepherd J, Pinto BM, May CR, Foster C. Systematic review and meta-analysis of maintenance of physical activity behaviour change in cancer survivors. Int J Behav Nutr Phys Act. 2019 Apr 27;16(1):37. doi: 10.1186/s12966-019-0787-4. — View Citation

Johnson CM, Molina Y, Blas M, Erickson M, Bayer A, Gutierrez MC, Nevin PE, Alva I, Rao D. "The disease is mine, the body is mine, I decide": Individual, interpersonal, and institutional barriers and facilitators among survivors of women's cancers in Andean countries. Health Care Women Int. 2018 May;39(5):522-535. doi: 10.1080/07399332.2017.1421198. Epub 2018 Feb 2. — View Citation

Karageorghis CI, Jones L, Priest DL, Akers RI, Clarke A, Perry JM, Reddick BT, Bishop DT, Lim HB. Revisiting the relationship between exercise heart rate and music tempo preference. Res Q Exerc Sport. 2011 Jun;82(2):274-84. Erratum in: Res Q Exerc Sport. 2011 Sep;82(3):592. — View Citation

Leach HJ, Danyluk JM, Culos-Reed SN. Design and implementation of a community-based exercise program for breast cancer patients. Curr Oncol. 2014 Oct;21(5):267-71. doi: 10.3747/co.21.2079. — View Citation

Loh SY, Chew SL, Lee SY. Physical activity and women with breast cancer: insights from expert patients. Asian Pac J Cancer Prev. 2011;12(1):87-94. — View Citation

María Isabel Calderón Cortés, Ospino MCO, Gianna María Henriquez Mendoza, Molina CÁ. Boletín legislativo & político. Salud Pública del Inst Nac Cancerol. Published online 2018:23.

Mason C, Alfano CM, Smith AW, Wang CY, Neuhouser ML, Duggan C, Bernstein L, Baumgartner KB, Baumgartner RN, Ballard-Barbash R, McTiernan A. Long-term physical activity trends in breast cancer survivors. Cancer Epidemiol Biomarkers Prev. 2013 Jun;22(6):1153-61. doi: 10.1158/1055-9965.EPI-13-0141. Epub 2013 Apr 10. — View Citation

McEwan D, Rhodes RE, Beauchamp MR. What Happens When the Party is Over?: Sustaining Physical Activity Behaviors after Intervention Cessation. Behav Med. 2022 Jan-Mar;48(1):1-9. doi: 10.1080/08964289.2020.1750335. Epub 2020 Apr 10. — View Citation

Midtgaard J, Røssell K, Christensen JF, Uth J, Adamsen L, Rørth M. Demonstration and manifestation of self-determination and illness resistance--a qualitative study of long-term maintenance of physical activity in posttreatment cancer survivors. Support Care Cancer. 2012 Sep;20(9):1999-2008. doi: 10.1007/s00520-011-1304-8. Epub 2011 Nov 15. — View Citation

Ministerio de Salud. RESUMEN EJECUTIVO Primeros resultados de la Encuesta Nacional de la Situación Nutricional en Colombia ENSIN - 2015. Published online 2015:64. http://www.ensin.gov.co/Documents/Resumen-ejecutivo-ENSIN-2015.pdf

Obesity: preventing and managing the global epidemic. Report of a WHO consultation. World Health Organ Tech Rep Ser. 2000;894:i-xii, 1-253. — View Citation

Pardo Ramos C, Cendales Duarte R. Incidencia, Mortalidad y Prevalencia de Cáncer En Colombia 2007-2011.; 2011.

Pinto BM, Ciccolo JT. Physical activity motivation and cancer survivorship. Recent Results Cancer Res. 2011;186:367-87. doi: 10.1007/978-3-642-04231-7_16. Review. — View Citation

Pluye P, Hong QN. Combining the power of stories and the power of numbers: mixed methods research and mixed studies reviews. Annu Rev Public Health. 2014;35:29-45. doi: 10.1146/annurev-publhealth-032013-182440. Epub 2013 Oct 30. — View Citation

Pudkasam S, Polman R, Pitcher M, Fisher M, Chinlumprasert N, Stojanovska L, Apostolopoulos V. Physical activity and breast cancer survivors: Importance of adherence, motivational interviewing and psychological health. Maturitas. 2018 Oct;116:66-72. doi: 10.1016/j.maturitas.2018.07.010. Epub 2018 Jul 23. Review. — View Citation

Rogers LQ, Hopkins-Price P, Vicari S, Pamenter R, Courneya KS, Markwell S, Verhulst S, Hoelzer K, Naritoku C, Jones L, Dunnington G, Lanzotti V, Wynstra J, Shah L, Edson B, Graff A, Lowy M. A randomized trial to increase physical activity in breast cancer survivors. Med Sci Sports Exerc. 2009 Apr;41(4):935-46. doi: 10.1249/MSS.0b013e31818e0e1b. — View Citation

Rogers LQ, Vicari S, Courneya KS. Lessons learned in the trenches: facilitating exercise adherence among breast cancer survivors in a group setting. Cancer Nurs. 2010 Nov-Dec;33(6):E10-7. doi: 10.1097/NCC.0b013e3181db699d. — View Citation

Sabiston CM, Fong AJ, O'Loughlin EK, Meterissian S. A mixed-methods evaluation of a community physical activity program for breast cancer survivors. J Transl Med. 2019 Jun 19;17(1):206. doi: 10.1186/s12967-019-1958-4. — View Citation

Sallis JF, Cervero RB, Ascher W, Henderson KA, Kraft MK, Kerr J. An ecological approach to creating active living communities. Annu Rev Public Health. 2006;27:297-322. Review. — View Citation

Schmidt T, Rudolph I, Wozniak T, Ruetters D, Van Mackelenbergh MT, Huebner J. Effect of ballroom dancing on the well-being of cancer patients: Report of a pilot project. Mol Clin Oncol. 2018 Sep;9(3):342-346. doi: 10.3892/mco.2018.1663. Epub 2018 Jun 28. — View Citation

Short CE, James EL, Stacey F, Plotnikoff RC. A qualitative synthesis of trials promoting physical activity behaviour change among post-treatment breast cancer survivors. J Cancer Surviv. 2013 Dec;7(4):570-81. doi: 10.1007/s11764-013-0296-4. Epub 2013 Jul 26. Review. — View Citation

Spector D, Battaglini C, Alsobrooks A, Owen J, Groff D. Do breast cancer survivors increase their physical activity and enhance their health-related quality of life after attending community-based wellness workshops? J Cancer Educ. 2012 Jun;27(2):353-61. doi: 10.1007/s13187-011-0306-z. — View Citation

Szalai M, Szirmai A, Füge K, Makai A, Erdélyi G, Prémusz V, Bódis J. Special aspects of social support: Qualitative analysis of oncologic rehabilitation through a belly dancing peer support group. Eur J Cancer Care (Engl). 2017 Nov;26(6). doi: 10.1111/ecc.12656. Epub 2017 Feb 13. — View Citation

Teixeira PJ, Carraça EV, Markland D, Silva MN, Ryan RM. Exercise, physical activity, and self-determination theory: a systematic review. Int J Behav Nutr Phys Act. 2012 Jun 22;9:78. doi: 10.1186/1479-5868-9-78. Review. — View Citation

Torre LA, Bray F, Siegel RL, Ferlay J, Lortet-Tieulent J, Jemal A. Global cancer statistics, 2012. CA Cancer J Clin. 2015 Mar;65(2):87-108. doi: 10.3322/caac.21262. Epub 2015 Feb 4. — View Citation

Torres A, Díaz MP, Hayat MJ, Lyn R, Pratt M, Salvo D, Sarmiento OL. Assessing the effect of physical activity classes in public spaces on leisure-time physical activity: "Al Ritmo de las Comunidades" A natural experiment in Bogota, Colombia. Prev Med. 2017 Oct;103S:S51-S58. doi: 10.1016/j.ypmed.2016.11.005. Epub 2016 Nov 12. — View Citation

Underwood JM, Townsend JS, Stewart SL, Buchannan N, Ekwueme DU, Hawkins NA, Li J, Peaker B, Pollack LA, Richards TB, Rim SH, Rohan EA, Sabatino SA, Smith JL, Tai E, Townsend GA, White A, Fairley TL; Division of Cancer Prevention and Control, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC). Surveillance of demographic characteristics and health behaviors among adult cancer survivors--Behavioral Risk Factor Surveillance System, United States, 2009. MMWR Surveill Summ. 2012 Jan 20;61(1):1-23. — View Citation

Wirtz P, Baumann FT. Physical Activity, Exercise and Breast Cancer - What Is the Evidence for Rehabilitation, Aftercare, and Survival? A Review. Breast Care (Basel). 2018 Apr;13(2):93-101. doi: 10.1159/000488717. Epub 2018 Apr 11. Review. — View Citation

World Economic Forum. The Inclusive Development Index 2018 Summary and Data Highlights.; 2018.

Wurz A, St-Aubin A, Brunet J. Breast cancer survivors' barriers and motives for participating in a group-based physical activity program offered in the community. Support Care Cancer. 2015 Aug;23(8):2407-16. doi: 10.1007/s00520-014-2596-2. Epub 2015 Jan 22. — View Citation

Yamashita S, Iwai K, Akimoto T, Sugawara J, Kono I. Effects of music during exercise on RPE, heart rate and the autonomic nervous system. J Sports Med Phys Fitness. 2006 Sep;46(3):425-30. — View Citation

* Note: There are 57 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in participants' physical activity levels	To assess the change from baseline participants' physical activity levels at 8 weeks, participants wore accelerometers for 7 consecutive days from awakening to bedtime using an elasticized belt around the waist at the right mid-axillary line. For wear-time validation, a minimum of four weekdays and a weekend day with at least 10 hours of wear during the waking time was required. Accelerometers were initialized to collect data at a sampling frequency of 80 Hz, downloaded in one-second epochs and grouped in 60-second epochs for analysis.	Physical activity levels were assessed at baseline and after the 8th week
Primary	Change in participants' motivation to engage in physical activity	To assess the change from baseline participants´ motivational regulation for physical activity at 8 weeks, we used the validated Spanish version of the Behavioral Regulation in Exercise Questionnaire-3 [BREQ-3], a 23-item inventory assessing the Self-Determination Theory relevant constructs (which conceptualizes motivation as a continuum ranging from amotivation to a high level of intrinsic motivation). Responses to each item were reported on a 5-point scale ranging from 0 (not true for me) to 4 (very true for me).	Motivational regulation for physical activity was assessed at baseline and after the 8th week
Primary	Change in participants' quality of life	To assess the change of quality of life, we used the official Colombian Spanish translation of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire. It incorporates five functioning subscales, three symptom subscales, six single symptoms, an item for illness-related financial difficulties, and a two-item general health/global QoL subscale. Each item was reported on a 4-point scale ranging from 1 (not at all) to 4 (very much), except for the general health subscale, which response options range from 1 (very poor) to 7 (excellent). High scores on the functioning subscales and the global health status/QoL subscale represent higher quality of life, while high scores on the symptom subscales indicate high levels of symptomatology. We also used a subscale of the EORTC questionnaire specific to breast cancer patients regarding physical symptoms for lymphedema; it comprises seven items with responses also ranging from 1 (not at all) to 4 (very much).	Quality of life was assessed at baseline and after the 8th week
Primary	Acceptability of My Body	We used a semi-structured interviewing technique to ensure in-depth insights about BCS' perspectives towards physical activity, their anticipated and actual experienced barriers and facilitators to engage in the physical activity intervention, their expected and reported benefits from the physical activity intervention, and the perceived positive and negative aspects of the program.	Semi-structured interviews were conducted after the 8th week
Secondary	Sociodemographic variables	To characterize the population, we collected surveys inquiring about sociodemographic variables (i.e., age, education, socioeconomic level, employment status, healthcare access).	Surveys were collected at the baseline
Secondary	Body mass index	Anthropometric data (height, weight) were directly measured by trained interviewers according to standardized procedures using scale and stadiometer. Body mass index (BMI) was calculated using the formula weight (kg)/height2 (m2); and classified according to the World Health Organization BMI classification	BMI was assessed at the baseline