Mini-Foot-Pump is very easy to use not only because it is built ergonomically but also for the simple fact that it is operated by foot.  This is a great advantage over hand pumps, especially, when pumping at higher pressures.

Why?  This is no rocket science!  The muscles in the legs are much stronger than in the arms and can exert  more force with less stress and fatigue while body weight adds to this force when pumping with foot.   Put them all together and you have a pump that delivers with little effort.