Pilates, Alexander, Technique, Physio etc, in fact many of the postures in yoga are also proven to be dangerous and unhealthy for your body.
that would explain why it is considered an extreme sport
theres no point to that statement, all the techniques you mentioned, while all just as good as yoga, or for some purposes even better, can be just as dangerous and unhealthy, much in the way lifting a table can be dangerous and unhealthy
all yoga is a spiritual practice IMO even hatha yoga, its opens chakra's or energy centers in your body which can leave vulnerable to spiritual forces that are not of God, and a major part of hatha yoga is the Sun Salutation which is basically sun worhsip and therefore idolatary IMO.
where in the christian holy scripture or any other article of faith does it say you have chakras? i mean god forbid you ever be open to something youre not sure is christian, but if you are a christian why worry about chacras?
and there is no sun worship in yoga
hindu believe in a solar personification, a lesser divinity of sorts, that has some mantras and one temple dedicated to him
this is not included in any part of yoga
the exercises and positions are named after what they resemble or when they are done, like "dog" or "archer"
that whole body bending movement is good for the blood pressure and the bowels also it is a good stretch so it is done in the morning
the sun comes up in the morning
so it is called salutation to the sun
in other books it can have other names
like morning exercise, or exercise tipe #1.
As for karate I never practiced karate so I dont know much about it but many eastern martial arts are demonic in origin and therefore unsuitable and incompatible with christianity.
i dont understand demonic in what way? why would a eastern martial art be demonic in origin? they were carefully thought up and perfected by practice usually by people in need of self defense
what is the demonic part?
at the end of the day you make your own choices, but IMO hatha yoga is not merely physical it is also spiritual and the suggestion that it is not is a deception.
well it is yoga, it has been and is a spiritual and even religious practice for millions of people over thousands of years
the point is, firstly it does not have to be practiced as a spiritual practice, any more than pilates or swimming or jogging, and secondly it is silly, especially from the perspective of a believing christian, to be aprehensive or afraid of something like yoga
obviously there is no real reason why you should chose yoga over any other method of exercise, or ever do yoga or even think about it again, in fact we have no way of assuming why you started doing yoga in the first place, and you have not told us if there was something in your direct experience that made you believe yoga is opening you up for something or someone, but now that you have found your god, or however you put it, what reason do you have to worry about spiritual influences of something people generally use to stretch in the morning?
and is that part on demonic origin your personal opinion or did someone teach you that?
). Even secular fitness programs such as pilates, weight circuits, even running, all have their spiritual aspects. What is the spiritual focus, for example, of pilates? Joseph Pilates acknowledged the mind-body connection and in fact that is a large part of the philosophy behind pilates. 
