Physical therapy of migraine- prudent or result of persuation of studies of methodological error!!!

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Some migraine patients find that regular exercise helps in reducing the frequency of headache attacks. Currently many headache experts are recommending exercise in migraine. However, most of these recommendations refer to some anecdotal reports or observational studies in literature stating that regular exercise can reduce the frequency and severity of migraine.
Busch V et al investigated whether recommendations for exercise in migraine are based on sufficient data to cope with requirements of an evidence-based modern migraine therapy. The review summarizes
1. Some results are controversial regarding the efficacy of sports intervention in migraine.
2. The majority of studies did not find a significant reduction of headache attacks or headache duration and only indicate a reduction of pain intensities in migraine patients due to regular exercise.
3. The grade of recommendation of exercise in migraine based on evidence based medicine (EBM)-criteria is presently B-C. But due to methodological limitations, the available data are insufficient for a final statement on this topic.

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