I have no idea what that response means, but know that I used my 1up from circa 2003 to 2009 with allot of 1 or 2 hour sessions that had lots and lots of intensity in them with intervals of all types.

that being said, I now do allot of indoor training and use a computrainer, which is among the best things I've ever purchased for my training; or e-motion rollers, which are also among the best things I've ever purchased for my training. price points are very different than a 1up trainer though.