Back in the day I spent the best part of three years working with NMR machines pretty much on a daily basis, also never noticed any physical effects. Once I al

Back in the day I spent the best part of three years working with NMR machines pretty much on a daily basis, also never noticed any physical effects. Once I almost had a magnet snatch my bunch of lab keys out of my hand, having forgotten the cardinal rule to "leave all magnetic materials at the desk before you approach the magnet with your sample tube"... Heard a joke about the children of NMR staffers having atypical sex ratio, but that was just student humour. I think :)