Fatigue is one of the most common symptoms of breast cancer and its treatment [1 Carlson LE, Angen M, Cullum J, Goodey E, Koopmans J, Lamont L, . High levels of untreated distress and fatigue in cancer patients. Br J Cancer 2004;90:2297–304.[Crossref], [PubMed], [Web of Science ®], , [Google Scholar] ]. Yoga is among the most commonly used complementary therapies for breast cancer [2 Fouladbakhsh JM, Stommel M. Gender, symptom experience, and use of complementary and alternative medicine practices among cancer survivors in the U.S. cancer population. Oncol Nurs Forum 2010;37:E7–15. [Crossref], [PubMed], , [Google Scholar] ]. Yoga encompasses physical postures, breath control and meditation. Recent systematic reviews indicate that yoga is effective as an adjunct treatment for cancer [3 Lin KY, Hu YT, Chang KJ, Lin HF, Tsauo JY. Effects of yoga on psychological health, quality of life, and physical health of patients with cancer: A meta-analysis. Evid Based Complement Alternat Med 2011;659–876. [Google Scholar] ]. The aim of this systematic review was to assess the evidence of yoga for fatigue in breast cancer patients.