Sleep problems are caused by stress, depression, anxiety and many more. Sleep problems can cause very bad effect on body physically as well as mentally. Sleep problems can cause insomnia and other problems .Running, brisk walking, cycling, and swimming, have been shown to improve sleep and battle insomnia.
These 3 yoga poses are going to help you get rid of all problems.
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Chandra Bhedana
Traditionally, the left nostril is associated with the body’s cooling energy and the right with its heat.
This left-nostril pranayama practice focusing the mind away from stress.
It massages the organs that activate the onset of sleep, signaling your vagus nerve to send messages to the brain to relax.
Sit in a comfortable position and make Mrigi Mudra (Deer Seal) with your right hand by bending your index and middle finger to your palm, leaving your ring and small finger extended.
Close your right nostril by your thumb and inhale through your left nostril. Then release your thumb and close your left nostril with your ring finger, exhaling through your right nostril. Do this for 5 minutes or until you feel calm.

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Padangusthasana
This exercise stimulates the liver and kidney in the back body. It activates the parasympathetic system that helps to release tension and putting the body to sleep.
Stand up with your feet hip-width apart. Gently fold forward from your hips and grip your big toes with your index finger, middle finger and thumb of each hand. Bend your elbow and actively ground your feet into earth, keeping your head down to relax your head and neck. Breathe deeply and hold for 1 to 3 minutes.

3.
Agnistambhasana

Sit according to the picture as this will actively focus on releasing tension in your hips, your body will respond by releasing tension in other muscle groups preparing you for a relaxing night sleep.