  Soft Gamma Repeaters (SGRs) undergo changes in their pulse properties and
persistent emission during episodes of intense burst activity. SGR 1900+14 has
undergone large flux increases following recent burst activity. Both SGR
1900+14 and SGR 1806-20 have shown significant changes in their pulse profile
and spin-down rates during the last several years. The pulse profile changes
are linked with the burst activity whereas the torque variations are not
directly correlated with the bursts. Here, we review the observed dynamics of
the pulsed and persistent emission of SGR 1900+14 and SGR 1806-20 during burst
active episodes and discuss what implications these results have for the burst
emission mechanism, the magnetic field dynamics of magnetars, the nature of the
torque variability, and SGRs in general.
