Siddhasana means the "Perfect Pose" in Sanskrit and is one of the most popular meditation postures. While practicing Siddhasana posture, one attains perfection in Yoga. Siddhasana is easy to learn and benefits the human body in various ways. Siddhasana is used as the practice seat for some of the pranayamas and the mudras. The positions of the legs and the hands also incorporate the body energies by closing the circuits and allowing the awakened vital forces to remain in the system during the meditation practice.

The Techniques for Siddhasana is as follows -

The practitioner has to sit down with both legs outstretched.

The bend the left knee and place the sole of the left foot against the right thigh so that the heel touches the perineum.

The practitioner should then bend the right knee and put the right heel against the public bone.

He/ She have to keep hands with palms open if done between sunrise and sunset; otherwise reverse the palms.

The spine should always be held erect.

Once Siddhasana has been mastered, it is truly a comfortable position for meditation practice.

Siddhasana and padmasana or the "lotus posture" are the two asanas used traditionally for dhyana (meditation) along with various Pranayama exercises, although many practitioners prefer Sukhasana or "pleasant posture" because of its ease on the knees. `Siddhasana` is performed by placing the left heel against the groin area or perineum, and the right ankle over the left. The left foot rests beneath the right leg, while the right foot rests in the fold behind the left knee. The spine should be held erect in Siddhasana. A small meditation cushion or zafu may be used to help in proper back alignment. According to some particular school or system of yoga, Siddhasana is often referred to as muktasana ("liberated posture") and guptasana ("concealed posture").

The aim of Siddhasana is to direct the energy from the lower psychic centers upward through the spine, thus stimulating the brain and calming the entire nervous system. This posture redirects blood circulation to the lower spine and abdomen, thus toning the lumbar region of the spine, the pelvis and the abdominal organs, and balancing the reproductive system and blood pressure. Siddhasana stabilises and sublimates sexual energy because of the location of the feet with respect to the genitals.

One can attain best results if he/she remains in this pose and narrate the mantra for as long as desired. However, the positions of the feet should be switched on alternate days or sittings. As a way of maintaining the balance, one should sit with the right foot on top at the beginning of the class and the left foot on top at the end. Siddhasana may be performed with either leg uppermost. To exit, one has to slide the right foot forward off the left foot, straighten the right leg and do the same with the left leg, and then return back into dandasana.

The position of the lower foot at the perineum presses Muladhara chakara, thus stimulating Mulabandha. The pressure applied to the pubic bone presses the trigger point for Swadhisthana and automatically activates Vajroli or Sahajoli Mudra. These two psycho-muscular lock systems redirect sexual nervous impulses and back up the spinal cord to the brain, thus establishing control over the reproductive hormones which is necessary to maintain Brahmacharya for spiritual purposes. If one does Siddhasana for prolonged periods, the result is noticeable. A tingling sensation is felt in the Muladhara region, which may last for fifteen to twenty minutes. This sensation is caused by a reduction in the blood supply to the area and by a rebalancing of the Pranic flow in the lower Chakras. There is a risk that this trauma to the nerves can lead to impotence in men if not done carefully. One must conveniently adjust the sitting position by using sitting supports to adjust the position of the genitals. Those with backache should not practice Siddhasana.

Many people, while practicing Siddhasana, experience discomfort due to the pressure applied where the ankles cross each other. If necessary, one can place a folded cloth or piece of sponge in between the legs at this point. At first the pressure at the perineum may be uncomfortable to execute but with practice it will become much easier. Siddhasana benefits the circulatory system immensely and is hence advised to be practised by all.