We conducted a systematic review and meta-analysis on the effect of different exercise interventions on fatigue in patients with breast cancer undergoing active therapy. We found that exercise generally improves fatigue outcomes at 12 weeks after initiation of the exercise intervention. Aerobic exercise intervention improved fatigue, but anaerobic and combination regimens did not show improvement compared to controls. Moreover, no exercise intensity was found to be superior compared to controls. Our findings revealed that there is a need for standardization of exercise regimens in studies in order to identify the most effective exercise regimen
