Seated Russian Twist >> Sit on the ground with your knees bent and your heels about a foot from your butt. Lean slightly back without rounding your spine at all. It is really important, and difficult, to keep your back straight, but don't let it curve.
“Relationships - of all kinds - are like sand held in your hand. Held loosely, with an open hand, the sand remains where it is.The minute you close your hand and squeeze tightly to hold on, the sand trickles through your fingers.