I learned about a battery-powered pacemaker-type device called ReActiv8 — the electrical impulses exercise the muscles for 30 minutes twice a day.  The device is implanted in an operation that takes an hour-and-a-half. The international ReActiv8 trials showed promising results in the 46 patients it has been tested in so far. The findings, which were presented at the International Neuromodulation Society congress in June, showed that 63 per cent of 46 patients had significant improvements in pain, disability and quality of life after 90 days.  You can find additional details in this article.