We discuss the application of T-duality to massive supersymmetric sigm
a models. In particular (1,1) supersymmetric models with off-shell cen
tral charges reveal an interesting structure. The T-duality transforma
tions of the BPS states of these theories are also discussed and an ex
plicit example of Q-kinks is given. (C) 1997 Elsevier Science B.V.