I'd refer to this as a "submarine article" or whatever, but that would mean that there was an actual link to the product somewhere in TFA...which if there is, I didn't find it:
US$40 and up. My wife has high blood pressure, but I don't. However, as a distance runner, this part interested me, so perhaps I'll get one or two:
"Craighead, whose personal marathon best is 2 hours, 21 minutes, says he has incorporated IMST as part of his own training."