I am in my fourth week of Yoga Teacher Training at a Vinyasa yoga studio. I began with Iyengar Yoga in 2004.
I am also not pleased with the concept of Bikram Yoga. Yeah, the heat helps you go deeper, but the point of yoga is NOT to go deep, or to have your heels on the ground in Downward Dog, or any of that other ego-boosting stuff. The point is really to learn to focus all of your mind on one thing, unity of mind, by quieting the little ego voices that chime in and get distracted. The key to this is mainly focusing on the breath during the yoga practice, to make the yoga poses flow from the breath. You find balance by activating all the muscles in a manner that balances all of the tension created, like a tug of war by two equally strong pullers so that the rope is taught and not moving anywhere. Proper form is not about heels on the ground in Downward Dog, or touching the floor in Triangle or any of that, though with regular practice you will inevitably get to that point (actually, my instructor has recommended anyone who touches their heels to the ground in Downward Dog modify the pose so they do NOT have their heels on the ground because that prevents them creating tension toward the heels in the pose).
Anyway, the goal is united focus, as a means of connecting with the Universal Consciousness / Spirit. Yogis do Yoga not to improve their bodies, but to become spiritually enlightened. It was invented so monks trying to meditate would be able to sit still in a meditative pose without having their bodily weakness / distraction hamper their meditation practice.
A natural byproduct of unifying the mind, and reuniting it more with the body (the sense of embodiment when the mind and body are united in an activity) is that you will find yourself losing desire for things that are unhealthy for the body, you will be more mindful when you select your meals, when you decide what to do with your free time, how to sit (up straight or slouching), etc. So, what winds up happening automatically, is you become more healthminded. You eat less junk food not as part of some diet where you are consciously depriving yourself of foods you crave, but because you actually do not crave them anymore.
However, habits die hard and you really need a regular yoga practice to see these benefits. It can be pricey. I'm actually doing the teacher training so I can know enough to create my own yoga routines with full confidence and not be dependent on any teacher or studio, figure it is cheaper in the long run. I also am very interested in the spiritual growth practice. And if it turns out I can make a living teaching yoga, maybe I'll even give that a go.
Oh, another motive for me is that I have become "one with the universe" through some psychedelic drug use, one time for three days, and I felt very much like I expect Buddha felt for that brief time. I don't think drugs can take you to a permanent ascension like that, so I have sought non-drug means to achieve the same thing. Because drugs are not a permanent solution to the problems of our spiritual restlessness or emotional cravings. According to what I've read and been told by certain yoga teachers, as you become more advanced and enlightened doing yoga, you learn to consciously control your moods. You can be in a state of bliss whenever you like, regardless of what is happening externally -- caught in traffic, money problems, etc. Apparently the spiritual fulfillment feels better than, say, the pleasure you get from hedonistic debauchery (another path I've explored and found only temporary satisfaction). So, anyway, that may be what drew me to Yoga in the first place 8 years ago.
I guess I should also add I'm not entirely convinced you have to stick with the established poses. I feel like I've gotten to know my body and I find myself just doing stuff in my home, like cleaning, cooking, laundry, and I stretch for something, and feel some tension in my body, some limitation in my freedom of movement. I'll stop what I'm doing, and find a way to harmoniously explore that tension in the body and I find myself in balanced poses of my own creation, suited to fit my own body and my own internal tension. Maybe these poses are established yoga poses I have not yet learned, but maybe not. So I think there can be a thing called "personal yoga" when you know enough to know the kind of feeling you are seeking in your yoga poses of balanced tension. I have some instructors that would call that heresy, because they think each yoga pose is based on thousands of years of experimentation to find poses that are like unique antenna calling in a certain frequency of universal energy, and other random poses might call in bad energy or no energy, but I am not so slavish to the yogic traditions, even though I do respect them. Similarly, yoga is tied to the Hindu religion somewhat and to belief in reincarnation, but I'm frankly skeptical about the notion of reincarnation, which some instructors are slavishly commited to.
I read once that Yoga was the science of religions, that if all yoga books were burned, people could reinvent yoga from their own personal experience and practice because it is self-evident when you breath and move and focus your consciousness internally. I like that notion. I hate the concept of dogmatic religion, of having to embrace absurd myths as part of your religion. I think, therefore, that if Yoga is true to this idea of being the science of religions, then it must be an evolving spirituality and they must leave open room to abandon any precepts that are later understood to be flawed. So, I like to think you can ascend in Yoga while remaining skeptical about any of their teachings that you yourself have not yet found to be sufficiently proven or logical or self-evident.
~psychoblast~