  We present an updated analysis of the quark mass dependence of the nucleon
mass and nucleon axial-vector coupling g_A, comparing different formulations of
SU(2) Baryon Chiral Effective Field Theory, with and without explicit delta
(1232) degrees of freedom. We discuss the outcome of the corresponding
interpolations between lattice QCD data and the physical values for these two
nucleon observables. It turns out that in order to obtain successful
interpolating functions at one-loop order, the inclusion of explicit delta
(1232) degrees of freedom is not decisive for the nucleon mass but crucial for
g_A. A chiral extrapolation of recent lattice results by the LHP collaborations
is also shown.
