. . . Published ahead of Print Medicine & Science in Sports & Exercise ® Published ahead of Print contains articles in unedited manuscript form that have been peer reviewed and accepted for publication. This manuscript will undergo copyediting, page composition, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered that could affect the content. Copyright © 2019 American College of Sports Medicine Heavy Resistance Training in Breast Cancer Patients Undergoing Adjuvant Therapy Rūdolfs Cešeiko 1,2 , Simon Nørskov Thomsen 3 , Signe Tomsone 1 , Jānis Eglītis 2,4 , Aivars Vētra 1 , Andrejs Srebnijs 4,7 , Mihails Timofejevs 2 , Egīls Purmalis 2 , Eivind Wang 1,5,6,7 1 Department of Rehabilitation, Rīga Stradiņš University, Rīga, Latvia; 2 The Oncology Centre of Latvia, Rīga, Latvia; 3 Centre of Inflammation and Metabolism (CIM) and Centre for Physical Activity Research (CFAS), Copenhagen University Hospital, Copenhagen, Denmark; 4 Faculty of 0edicine, University of Latvia, Rīga, Latvia; 5 Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, Trondheim, Norway; 6 Faculty of Health Sciences and Social Care, Molde University College, Molde, Norway; 7 Department of Internal Medicine, University of Utah, Salt Lake City, UT Accepted for Publication: 13 December 2019 ACCEPTED