Think there is also a Christian type of yoga available?
I do what I call "fake yoga". First, I need to submit to God, in prayer, then see what He has me doing for movement, strengthening, and stretching. This turns out to be in every direction for every muscle and joint. There is rotating, included, in order to get every direction of stretch and against my own resistance. And be prayerful for God's guiding.
In my case, I am 72 years old, and I do not have daily physical challenges. So, I do variety-pack stretch and strengthen and rotate activities so all my muscles and joints and bones get a gentle and humble workout. It is more for maintenance. A lot of it can be full contraction of muscles in every direction for every joint > this can cause circulation, too.
"And let the peace of God rule in your hearts, to which also you were called in one body; and be thankful." (Colossians 3:15)
I see this means for me to do, always, exactly what God's peace has me doing. So, peace is not the goal, in a way, I think; but I obey the peace ruling me.
Having control over your thoughts
If I obey how God's peace manages my mind and heart . . . I discover how He controls.
Each Yoga position is a form of worship to the pagan god.
I do not have any positions which are supposed to make me right with God or get my mind and heart right. And I avoid doing the exact same motions and positions, every time, in order to have variety and exercising every muscle with motions and stretches and self-imposed resistance. Each time, activities can be unique, but there is recycling
I remember reading somewhere that the poses themselves are prayers to hindu gods but I don't have a source and don't know if that statement is true.
Therefore, we can be creative. I would say every position needs to have stretch and/or strengthening against resistance; and each joint rotating in full stretch and against resistance is much better than just holding some position.
Is this putting trust in something besides God?
I think this is a very good point. This can be asked, too, about eating food . . . driving a car . . . wearing clothes . . . breathing . . .
Same goes for peace; I have found great peace from a number of mental relaxation techniques, yoga & mindfulness meditations included, and I see no way that God is excluded from these things, unless we choose to make yoga into a rejection of Him (which seems odd; why not just thank Him?).
I would say if we are controlling our own selves to choose and do something > this is at risk of depending on our own selves, instead of God >
"for it is God who works in you both to will and to do for His good pleasure." (Philippians 2:13)
God's peace is not only feeling better, or getting nasty stuff out of mind. God's peace is personal, God sharing with us while guiding us. And why go on time out from this??