The dumbell curl with wrist proniation is an advanced form of the standing dumbell curl
which is used to add extra "burn" to the bicep
It is done by doing a standing dumbell curl
but as the arm reaches the point of contraction twist the wrist so that the pinky finger
faces slightly upward and is slightly higher than the thumb.
This movement isolates the belly of the bicep which is the part on the inner arm and makes up the bulk of the bicep.
As with any exercise please make sure to follow the weight lifting safety tips