Start by standing on all fours, keeping the arms at shoulder length and legs hip width apart, both arms and legs perpendicular to the floor.
Breathe in and lift the left leg and the right arm up, keeping the lifted arm and leg straight and parallel to the floor.
Hold the position for about 30 seconds breathing normally. Lower the arm and leg down and switch sides.
This posture helps to stretch the back, improves balance and body strength.
For a more advanced position bend the lifted leg and hold it with the opposite hand.
Marcia has been practising yoga for over 20 years and has specialised in the Hatha and Ashtanga schools of yoga, although has also enjoyed learning other branches such as Iyengar. As well as yoga she practices meditation, and plays a wide range of sports, including badminton, cricket, cycling, and walking.