Originally Posted by
UnfilteredDregs
You sure can, but not in any form or method that relates to actual riding...to do so results in one shooting the bike backwards out from under them...
Although there is another brand I can't recall at the moment that purports to being able to handle out of the saddle efforts, besides the E-Motion...
There are no rollers that you can do max effort on unless they are strapped down. But...not the purpose of rollers.