Yoga 'can help cancer survivors sleep better'
New York, May 21, 2010
Cancer survivors may want to try yoga - including special postures and breathing and mindfulness exercises - to get a better night's sleep and to boost their energy levels, according to a US study.
Researchers from the University of Rochester Medical Center in New York randomly assigned more than 400 cancer survivors, most of whom had been treated with chemotherapy for breast cancer, into two groups.
One group did gentle Hatha yoga and restorative yoga -- including special postures and breathing and mindfulness exercises - twice a week for a month. The other was only monitored, following standard practice.
Those who did yoga were able to cut back on sleeping pills and slept better, as measured by a 22 per cent increase in sleep quality on a commonly used scale. That was nearly twice the improvement of survivors who didn't do the exercises.
Yoga also cut fatigue by close to half, and led to a small increase in quality of life.
That is good news for cancer patients, said researcher Karen Mustian who led the study that will be presented at the American Society of Clinical Oncology Annual Meeting in early June.
'We really don't have any good remedies for fatigue for cancer survivors,' she told Reuters Health.
Although patients may take drugs to help them sleep, such medications have side effects and aren't usually long-lasting which led Mustian's team to look for alternatives.
How yoga achieves its relaxing effects isn't completely clear. 'It may be promoting social bonding,' Mustian said, adding that preliminary studies have suggested it could also lower stress hormones.
For cancer survivors seeking help from yoga, Mustian recommended looking for Yoga Alliance-certified instructors, especially those who have experience with people dealing with illness. She also stressed that the results may not apply to all forms of yoga.
Dr Douglas Blayney, president of the American Society of Clinical Oncology, said physicians and oncologists were often uncomfortable advising patients who wanted to use therapies that were complementary to standard cancer therapy.
'A physician can say with some confidence, 'yes, this kind of yoga program may be useful',' Blayney, who was not involved in the research, told Reuters Health.
'Here we have a studied intervention, one that has been subjected to clinical trials and, lo and behold, it seems to be beneficial.'
Yoga is a spiritual practice that began in India an estimated 5,000 years ago as a combination of physical and mental exercises. Historians have traced its roots back thousands of years to references in Hindu and Buddhist texts.
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