Unlimited Stamina is the ability to fuse your own endurance with Psionics to make it so that you can run longer (not forever as the name suggests). It doesn`t mean that you can run faster, it just means that you can ugment your natural running ability to make it so that you can run longer for longer and the same pace, so long as you focus.
THIS ABILITY IS FAKE!!
Unlimited Stamina is not possible due to the fact that everyone has different indurance levels and the sceience behind this ability make it not possible, yes it could make you seems that you have MORE indurance because you are pushing yourself, but either than that THIS CASE IS CLOSED!