  We study the effect of center-of-mass motion and rotational corrections on
hedgehog meson fields in the bosonized two-flavor Nambu \& Jona-Lasinio model.
To remove the spurious motion and to restore good spin and isospin we consider
a boosted and rotating soliton instead a static soliton at rest. Modified meson
fields are obtained by minimizing a corrected effective energy functional. The
importance of the modification is estimated by evaluating expectation values of
several observables. Stabile solitonic configurations are obtained for $M\gapp$
300\,MeV, while static solitons exists for $M\gapp$ 350\,MeV only. Despite the
considerable size of the energy corrections (30-50\% of the soliton energy) the
main features of the static soliton are preserved. Modified meson profiles are
somewhat narrower than static ones and have a different asymptotic behavior,
which depends on the isospin quantum number. The modifications increase with
increasing constituent quark mass. The valence-quark picture dominates up to
very large constituent quark masses. In the physically relevant mass region,
the root-mean square radius of the quark distribution is reduced by less than
10 percent. The $\Delta$--nucleon mass-splitting is still weaker affected.
