The Washington Post has an excellent piece (subscription required) debunking this viral theory. If the levels of EMF radiation measured at the 49ers’ practice facility weakened ligaments, we’d all have torn ACLs. When cornered, Peter Cowan, the self-proclaimed expert who popularized this theory, admitted he had no hard evidence and moved the goalposts:
In an interview, Cowan acknowledged he hadn’t seen any research specifically on EMF damage to muscles and tendons; he drew connections from other studies and his own observations as a clinician, he said. He also didn’t know the 49ers started practicing in Santa Clara so long ago. If he had, he would have broadened his research to track the rising number of cell towers in the area. He said he remains “confident” the substation contributed to the injuries.
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