Using a low pulley or band, stand
facing away from the machine with the cable between
your legs using a medium, narrow or wide stance. Begin
by letting the cable pull your torso through your
legs,

then flex back to the starting position making
sure to squeeze your glutes as you rise. These can be
done flat, round or arch backed and with straight legs
to emphasize the lower back or bent legs to emphasize
the glutes and hamstrings.

Above two photos represent the straight leg version.

BACK