Yoga is not bad if only used for stretching alone,but then I suppose it would not be yoga,but a stretching exercise.
It is bad the way the world looks at it,that they think it has a spiritual benefit,which it does not,for only by Jesus is there a spiritual benefit by the Spirit,and they meditate,and empty their mind,and do other things,like align their chakras,feel energy flow through their body.
To me I believe that them meditating,and the things they do to bring peace to their mind,gives them a spacey mind,and OCD,and is not good for them,all the while they think it is a benefit.
I believe that we think the best,and are at our mental best,when we leave our mind alone,and think good thoughts,but keep our mind moving around from subject to subject,for it is like lifting weights,if you keep lifting the weights eventually your muscle will have stress,and fatigue,and so it is with going over the same things in your mind,it will eventually have stress,and fatigue,and that emptying their mind is not good.
They will create a feeling of never being satisfied,and will cause them to seek more of the occult to satisfy themselves,which the new age movement(1 Timothy 4:1-5;2 Timothy 4:2-4),which has an interpretation of the Bible,as well as all religions,based on spiritual evolution through nature,is the future for this sinful world,which the man of sin,the beast,will promote it,and have the traits of it,and will claim to be God by harnessing the power of nature,and obtaining power,evolved,and will share this power with the people that follow him.
Eventually they will not be delighted in the things that they do today to try to better themselves,but they will be baby toys to them,as they lust for more power they cannot get on their own,and they will turn to the New Age Christ to supply that craving.
But I believe that what they do is not good for the mind,for you have to leave your mind alone,and think normally.Do not meditate,do not repeat phrases,and do not empty your mind.
If it were a benefit then God would have us do that,but He said whatever is lovely,and good,and pure,and the such,think about that.
And we do meditate on the word of God,but that is trying to understand it,and not as the world does with their meditation.
Which this is what is seems like to me.I keep my mind moving from subject to subject,and will only try to understand something as long as my mind is fresh,and when I cannot get any further,I leave off the subject,for to go over it more will put stress on the mind as it searches for something it cannot think of,but might go over it like 2 days later,but when I cannot get understand any more,I leave off of it.
We know people get stress if they keep going over the same thing,and worry,and they say people that have OCD have stress,and what I think that the people in to yoga,and the such,give themselves a spacey mind,so they do not have the stress so much for they space out their mind,but when they are done doing their practices,they will not feel right after a while until they do their practices.
It is like they have to do their practices that space out their mind to feel right,but it creates a dull feeling after the practices,and when the mind settles down,and then they have to do it again to feel right.
It is like they are running on the spacey feeling of their mind,as their mental state they like.
I do not know for sure,and I do not want to find out,but that is what it seems like to me,for you have to leave your mind alone,and think normally,and forget those practices.