There's no science to it on my end, it just feels so much better pulling in a heeled shoe. And I didn't commit to it until I saw Misha Koklyaev do it. Once I saw him pull with them I knew it was probably ok, haha.I wouldn't deadlift in them. I'd rather go barefoot with conventional than a heal. Olympic lifters wear them obviously, but setting up for a cleaning portion of a lift is different than setting up a deadlift. Although, Torobestia pulls a crap load of weight in an Oly shoe, so maybe he can elaborate more.