  The presence of pulsations influences the local parameters at the surface of
massive stars and thus it modifies the Zeeman magnetic signatures. Therefore it
makes the characterisation of a magnetic field in pulsating stars more
difficult and the characterisation of pulsations is thus required for the study
of magnetic massive stars. Conversely, the presence of a magnetic field can
inhibit differential rotation and mixing in massive stars and thus provides
important constraints for seismic modelling based on pulsation studies. As a
consequence, it is necessary to combine spectropolarimetric and seismic studies
for all massive classical pulsators. Below we show examples of such combined
studies and the interplay between physical processes.
