  We study axisymmetric solutions to the wave equation on extremal Kerr
backgrounds and obtain integrated local energy decay (or Morawetz estimates)
through an analysis \textit{exclusively in physical-space}. Boundedness of the
energy and Morawetz estimates for axisymmetric waves in extremal Kerr were
first obtained by Aretakis through the construction of frequency-localized
currents used in particular to express the trapping degeneracy. Here we extend
to extremal Kerr a method introduced by Stogin in the sub-extremal case,
simplifying Aretakis' derivation of Morawetz estimates through purely classical
currents.
