Everyone (medical science) speaks about immunity and diseases that lack of immunity invite diseases. Its truth, i know, but another eternal truth is lack of emotionalism.  Behind immunity the role of emotion is very powerful and important. I have a lot of case studies where i found this truth. During extreme emotional fluctuations, digestive or intestinal activity become less, immunity comes down because hormonal secretion get disturbed. Even during abnormal hormonal secretions, blood circulation, nerves and muscles become weak. Here are some medi yogic & meditative exercises which may build-up your emotions.
Shashank asana
Keep your hands on knees sit in vajrasana. Inhale and raise hand towards head. Now bend touching your forehead to the ground. Upper part and hands should be completely stretched breathe normal and hold it. But without raising hip from toes. Now inhale and bring hands and chest back to normal position and come in vajrasana.
Check point  
While doing the asana if you feel pain in lumbar (back) or cervical region then do not hold it for long. It should be avoided in slip disk also.
Purpose
This asana is very beneficial for people having stiff spine. In this asana the whole spine is stretched and it is very relaxing technique.
Goumukhasana
In yogic therapy, goumukhasana has got great importance. Especially neck and cervical spondylitis patient’s gets maximum benefit from this asana.
Technique
Keeping your back straight spread your legs and sits comfortably. Make your mind to do this asana and inhale deeply 2-3 times. Now fold your left leg from the knee and touch the heels to the right hip and right leg should be kept on the side of left leg. Knees should be kept one upon the other. Now take right hand up and bend it from elbow to place it on your back and take left hand from downward to interlock both hands.
Neck should be straight chest should be blown outward. Look straight keeping your breath normal for half a minute. Now change position of hands and legs do the same exercise.
Check point
While doing exercise one should be alert towards breathing. Normal breath must be experienced throughout. At the back of chest where both hands fingers are interlocked. One should concentrate on that part.
Purpose
It makes chest, thoracic and cervical part stronger. Even our lungs and trachea gets strengthened and it removes all obstruction related to these part.
Sarvanga Asana (shoulder stand)
The Sanskrit word sarva+anga means whole+body, The asana for complete body.
Lie flat on the back. Inhale and exhale deeply and slowly and relax whole body.
Now fold your both legs at knees, with support by your both hands (under hip and waist) raise lower part of the body and raise legs and spine until the toes point  to the ceiling. Keeps the spine and legs straight. In this pose breathing should be normal, concentrate on neck and head.
To come out of this posture, just bend your knees, curve your back and slowly return to lying on the floor while exhaling. First bend your knees, put the palms on the floor, then curving the spine, gradually unfold it the way one unrolls a carpet. When your entire back touches the floor, straighten the knees, take a deep breath and slowly lower your legs to the ground while breathing out.
Result 
The main benefit of the shoulder stand is to get the thyroid gland working at peak efficiency. It’s the thyroid gland which is mainly responsible for your correct weight and youthful appearance.
The shoulder stand also regulates the sex glands.
It vitalizes the nerves, purifies the blood and promote good circulation, strengthens the lower organs and helps them to stay in place.
It gives a healthy stretch to the neck muscles.
It is beneficial for people suffering from poor circulation, constipation, indigestion, asthma and reduced virility.
This pose is especially recommended for women after childbirth and for those suffering from painful menstruation, other female disorders, and seminal weakness.
Time
It can be retain this position for fifteen seconds to five minutes, adding fifteen seconds per week.
Check point
Do not try this exercise if you are suffering from organic disorders of the thyroid gland. Be very cautious if you are suffering from high blood pressure, any major brain disease and chronic nasal catarrh. 

Anulom-vilom (alternate nostril breathing) 
“by proper practice of pranayama etc, all diseases (mental or physical) are eradicated. through improper practice all diseases can arise.”
yogi swatmaram states that alternate nostril breathing purifies the nadis (whole nervous system) within three month.
Technique: sit in any comfortable meditative pose or on the chair, close the right nostril and inhale slowly, steadily and deeply through the left nostril, after full inhalation hold it for a while and now close the left nostril and exhale slowly steadily through the right nostril.  slowly inhale again through the right nostril and exhale from the left. this is one round .lets do this for 5 to 10 minutes with closed eyes.
checkpoint: while practicing, be sure that there should be no strain on the face and the head and body do not tilt in any direction. if you have high blood pressure or heart trouble, then avoid holding breath exercises.

Effect: it helps to reduce the level of stress, frustrations, anxiety and hypertension.