There is evidence, that pulsing electromagnetic fields may improve fatigue associated with multiple sclerosis.

http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12658965&dopt=Abstract
Wien Med Wochenschr 2003;153(3-4):65-72
Zifko UA.
Sonderkrankenanstalt fur Neurologie, Klinik Pirawarth, Kurhausstrasse 100, A-2222 Bad Pirawarth.