  We consider an extension of the one-nucleon sector of baryon chiral
perturbation theory beyond the low-energy region. The applicability of this
approach for higher energies is restricted to small scattering angles, i.e. the
kinematical region, where the quark structure of hadrons cannot be resolved.
The main idea is to re-arrange the low-energy effective Lagrangian according to
a new power counting and to exploit the freedom of the choice of the
renormalization condition for loop diagrams. We generalize the extended
on-mass-shell scheme for the one-nucleon sector of baryon chiral perturbation
theory by choosing a sliding scale, that is we expand the physical amplitudes
around kinematical points beyond the threshold. This requires the introduction
of complex-valued renormalized coupling constants which can be either extracted
from experimental data, or calculated using the renormalization group evolution
of coupling constants fixed in threshold region.
