Should Christians Practice Yoga?

"Yoga" means "to join to" or "to make a connection". 

Here's the purpose of Yoga from the three theological schools: "Bhakti schools of Vaishnavism combine yoga with devotion to enjoy an eternal presence of Vishnu. In Shaiva theology, yoga is used to unite kundalini (you body's energy) with Shiva. Mahabharata defines the purpose of yoga as the experience of Brahman or Ātman pervading all things." (Wikipedia)

Here is the question: "Who are Vishnu, Shiva, Brahman and Atman?" and what's the problem with yoga?

"Vishnu" is one of the greatest Hindu God's. Vishnu incarnates on Earth from time to time to eradicate the evil forces, to restore the Dharma (Law of the Universe) and to liberate the worthy ones or devotees from the cycle of births and deaths" . (Wikipedia)

"Shiva" is another supreme Hindi God (depending on which sect) and is the "destroyer God". He's often expressed in deep meditation. He's the God who transforms you.

"Brahman" is the Hindu God "the eternal, infinite, and omnipresent spiritual source of the finite and changing universe." (Wikipedia). In fact he would be one of the "other God's" from the First Commandment.

"Atman" is your soul in unity with God (Brahma). In essence you are submitting yourself in yoga to total control of Brahman.

Deceitful people (Yoga instructors) most often say that "Yoga is not a religion." They are not lying. They're just not telling the whole truth. While Yoga is not a "religion" it is "discipline" (compliance) to Buddhism. It's the practice of religion, specifically Hinduism.

Exodus 20:3 “You shall have no other gods besides (or in addition to) me.4 “You shall not make for yourself an image in the form (including Yoga) of anything in heaven above or on the earth beneath or in the waters below. 5 You shall not bow down to them or worship them; for I, the Lord your God, am a jealous God."

Deuteronomy 4:16 "so that you do not become corrupt and make for yourselves an idol, an image of any shape, whether formed like a man or a woman," (Buddha is a man God and when you visualize you are honoring Buddha).

You can see that God holds worship of foreign God's as a severe transgression. By doing so, you're corrupt. You're unholy!

But, you say... I'm not worshiping in my heart... I'm merely exercising." You may rationalize your own rebellion with that thought, but try that excuse with God! God is the one who destroyed the man who improperly carried the arc after God had given him clear instructions. "But", the man rationalized... "the arc was about to fall!". God didn't accept his rationailzation for disobedience and he won't accept yours!

Remember, Jesus never came to end the law, but to fulfill it! Remember that even Gentiles are to not do the things pagans do (See Council of Jerusalem in Acts 15).

Don't be disobedient! Don't do things the pagans do. Respect God enough to honor him. The practice of having other God's besides the One True God is called syncretism. God punishes severely those who practice the worship of other gods!