This decreases the moment arm and the spring will offer a greater spring resistance.
The moment arm of the elevator will also be reduced, which makes it more difficult to recover from a stalled condition.
Your joints are supposed to expand, to offer a larger moment arm for the muscles.
That is the mechanical advantage of the moment arm that you mention.
This allows the foot to remain in contact with the ground for longer amount of time while decreasing the moment arm.
A spade works in the same manner as a horn but is more efficient due to the longer moment arm.
The distance from the center of mass at which you apply a force is called the moment arm.
A larger moment arm reduces the force needed to rotate a pulley.
In this concept the moment arm, the distance from the axis of rotation, plays an important role.
A few things to stow that have been weighed and their moment arms calculated.