Stand up straight with a resistance band secured in front of you.
Attach the other end of the band around the knee of the leg you would like to exercise.
Bend this knee, allowing it to travel forwards.
There should be some tension in the band at this point.
Keeping your posture upright move this leg directly backwards.
Drive the movement from your buttock muscles ensuring you keep your body completely still.
Think about pushing your foot back behind you.
Control the movement as you bring the leg back to the starting position to repeat.