The Single Leg Kick is an effective core stability exercise that emphasizes the spinal extensors.

5 Repetitions Each Leg alternating
*Sufficient practice in Hundred, Rolling, Roll up, Single and Double Leg Stretch, and Shoulder Bridge is important prior to executing this exercise
The general concept of the Single Leg Kick is to maintain deep abdominal connection in conjunction with spinal extension to stabilize and stretch the hip.
Although it seems to be a leg exercise, it really is a back exercise!
Tips: Avoid swinging the leg with momentum-imagine squeezing an imaginary ball situated between the heel and buttock.
The lower back should not 'dip' down with the leg kick.
Keep head in line with upper back and chest open.
Avoid if really difficult to maintain position and there is considerable neck/shoulder tension.