In half kneeling, move weight forwards and straighten the hip of the rear leg.
Lift the knee of the rear leg and straighten the front leg. Lean forward from your trunk to stretch the back of the thigh of your front leg.
Return the knee of the rear leg to the floor and straighten the hip. Lower the (front leg side) forearm towards the floor. Push your pelvis towards
the floor and rotate your trunk away from the front leg.
With the same arm (front leg side), rotate in the opposite direction and reach upwards. Maintain low pelvis position, straighten the rear hip and rotate from the trunk.
Then move the rear leg to the front and repeat the sequence from the beginning.