Effects of acceptance and commitment therapy on fatigue for patients with cancer and other chronic health conditions: A systematic review and meta-analysis

•Fatigue is one of the most reported and debilitating symptoms in chronic health conditions.•ACT has been proposed as a potential psychological intervention for fatigue in chronic health conditions.•ACT interventions show some efficacy for reducing fatigue in chronic health conditions.•Only RCT's relating to chronic health conditions cancer and fibromyalgia met eligibility criteria.