HOW: Begin laying on your back with both legs straight. From this position, think about squeezing your glutes together and hold for the prescribed amount of time before relaxing.
FEEL: You should truly feel your glute muscles working with this exercise. Try to keep your quads and low back muscles relaxed as you perform this exercise.
COMPENSATION: Try to avoid activation of the quads, low back muscles and hamstrings as you perform this exercise. Use your hands and place them on your glute muscles if necessary to feel if you are able to engage these muscles specifically.