Yoga is certainly demonic.

Now onwards, I am strictly writing about Yoga as strictly a physical exercise. Yoga was developed and first taught by the Hindu deity Shiva. Google image search Shiva, certainly demonic. If you are a Christian, then you may know that there is not a single verse in the Holy Bible that says directly that you have to do any certain physical exercise to be healthy. 

   Yoga exercise mimics animals' most aggressive poses. The Bible does not say a word about animals, but refers to animals as 'beasts' throughout the Bible. You know who is a beast. Also, when Jesus cast out demons, they went into pigs. That is proof that animals have demonic spirits in them. Now search mimicry. It is the best way to communicate with animals. Now, combine all the above facts and search for the words "shamanism" and "spirit animals." You have your answer here.  Simply, Yoga poses mimic animals' most significant poses, and when you do them, you are indirectly communicating with that animal. Well, to be clearer, you are indirectly communicating with the evil spirits in the body of that type of animal. When you do such a difficult yoga pose, you lose your focus on the Jesus/worship song you are playing as an excuse to do Yoga. For that moment when you empty your mind of Jesus, you are INDIRECTLY opening yourself to that specific demon in that animal whose pose you are doing. From that moment, that specific evil spirit slowly and steadily controls your soul (not your spirit), and you start to lose interest in the Word of God. You sin more and more. And this happens very, very slowly, and you do not even recognize it. 

The most famous Western Christian yoga pose is the 'cobra' position. It is said in Hindu scriptures that yoga is designed to awaken the serpent (kundalini) spirit coiled at your spine. By doing yoga, you are surrendering your body to demons, and so they give you healing and health power. Of course, you feel good after doing yoga, and so after you do drugs. Yoga can become an addiction over time. Yoga is not a belief that you could separate from exercise. Yoga is a demonic technique (such as witchcraft) to invite unclean spirits into your life. 

In 1 Timothy 4:1, God said, "Now the Spirit speaketh expressly that in the latter times some shall depart from the faith, giving heed to seducing spirits and doctrines of devils." 

Yoga is the doctrine of the devil, Shiva. Do you still want to follow it? 

If you still disagree, then ask Jesus Himself to show you the right path. Ask him...onward.