  We investigate the effects of the spin-isospin channel of the Skyrme energy
functional on predictions for Gamow-Teller distributions and superdeformed
rotational bands. We use the generalized Skyrme interaction SkO' to describe
even-even ground states and then analyze the effects of time-odd spin-isospin
couplings, first term by term and then together via linear regression. Some
terms affect the strength and energy of the Gamow-Teller resonance in finite
nuclei without altering the Landau parameter g_0' that to leading order
determines spin-isospin properties of nuclear matter. Though the existing data
are not sufficient to uniquely determine all the spin-isospin couplings, we are
able to fit them locally. Altering these coupling constants does not change the
quality with which the Skyrme functional describes rotational bands.
