The single leg bridge is a great exercise for glut activation and cuing in glut activity with hip extension. Proper form is vital for this exercise. The pelvis should remain level (as if a ruler was parallel to the floor if laid across the front of the pelvis) throughout the movement. The pelvis should be raised so that the trunk is fully straight (as it would be in standing). Typically the biggest errors is rotation of the pelvis or failing to get the last bit of extension at the top.
