  The simplest example of the $\lambda$-deformation connects the SU(2)
Wess-Zumino-Witten model with the non-Abelian T-dual (NATD) of the SU(2)
principal chiral model. We analyze spinning strings with one spin propagating
through the $\lambda$-deformation of the target space of the interpolation. We
show that the situation apart from the NATD limit parallels the undeformed
case. We demonstrate that regular spinning strings are either folded or
circular, and that nearly degenerate spinning strings are either nearly
point-like, fast, or slow. The effects of the $\lambda$-deformation are both
the overall increment of the energy of spinning strings and the enlargement of
the gap between the energies of folded and circular strings. In the NATD limit,
we prove that circular strings disappear and that fast strings realize the
dispersion relation of Gubser-Klebanov-Polyakov strings.
