Walking for 30 minutes a day and practising yoga can help reduce fatigue in cancer patients and cut the risk of the disease spreading, coming back or resulting in death, research suggests. Globally, more than 18 million people develop cancer every year. It is well known that being inactive raises your risk of various forms of the disease. For decades, many oncologists and health professionals have remained reluctant to push patients to exercise in the wake of sometimes gruelling treatment regimes. But the tide appears to be turning. Three studies presented at the annual meeting of the American Society of Clinical Oncology (ASCO), the world's largest cancer conference, add weight to growing evidence that physical activity can help, not hinder, patients. The first study [examined] the impact of yoga's effect on inflammation. The research ... found those who took up yoga had significantly lower levels of pro-inflammatory markers" compared with patients in the other group. In the second study, [participants] attended 75-minute yoga or health education classes twice a week for four weeks. Yoga was found to be better at helping relieve fatigue and maintain quality of life, the research found. A third study found cancer patients who are active can reduce their risk of dying by almost a fifth. Patients were ranked by their activity levels, with "active" classed as going for at least one 30-minute walk five days a week. After 180 days, 90% of people in the active group were still alive, compared with 74% in the sedentary group.