‘Sarva’ means Every, ‘Anga’ means Body part – so, it is a pose that is ‘beneficial to every body part’
Shoulder stand as it is called in English has many of the benefits of Shirshasana (headstand) and is often called the ‘queen of asanas’.
It improves the blood circulation to the head and upper part of the body – which usually happens against gravity while we stand, sit through the day.
Sarvangasana also strengthens the shoulders and also tones the abdominal organs as the body is held in posture against gravity.
The effect of the chin nearly touching the chest positively impacts the Vagus nerve functioning, so that the parasympathetic nervous system is stimulated. This causes the lowering of the heart rate and breathing rate which are important in the reduction of stress.