
Here are some of the reasons why yoga may be helpful for sleep:
Breath Awareness
Because breathing is an important aspect of yoga, daily yoga practice may help you become more aware of your breathing and how it affects your mind and body.
Relaxation
Relaxation is a critical component of yoga. Deep breathing, in particular, may aid in the relaxation of the body and the improvement of sleep.

Mindfulness
Since yoga, has a mindful aspect, it may also benefit certain people. Meditation, which is paying full attention and awareness to the present moment, has been demonstrated to enhance melatonin levels in the body. Melatonin is the sleep hormone so keeping it balanced is essential for a good night’s sleep and improved sleep quality.
Physical activity
A large number of studies have shown that regular physical activity may help in the advancement of sleep quality. Even though you should generally avoid strenuous physical activity in the evening hours, mild to moderate exercise, such as gentle yoga, will not interfere with your sleep and may even help you sleep better if done regularly.