Greetings of the day,
There are no promising treatment options available as yet but stem cell therapy has showed better results .With this and supportive medication and physiotherapy the patient is at least able to do his daily activities.However sternous activities like walking a long distance it difficult to achieve.
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Next Steps
Till then maintain his/her muscle strength and breathing patterns.
Health Tips
It would be good if he practises pranayam and other types of yoga under a licensed personnel