If you have problems viewing the video, here is a set of still images to show you the exercise.
|Stand by a low window ledge, a table or a sofa back. Keep the feet forward and a handsbreadth apart.|
|Slowly bend at the hips and lower your body until the knees are flexed 45 degrees. The shoulder, hip and heel should be in a straight line. Hold this position for 10 seconds.|
|Slowly stand up again. Repeat 5 times.|