Yoga is a science of mind. Asanas – or postures – are just one step in the 8-limbed path of yoga, as described in classic texts.
Yoga concerns itself with the goal of peace and equanimity, along with wisdom of the natural world. The steps for achieving these goals are described with precise detail, and have been followed for centuries. The remarkable reproducibility of outcomes instills the scientific validity to instructions, such as the Yoga Sutras of Patanjali.
As one example, discipline and practice are two foundational principles of yoga. Translated to neuroscience, we can confidently expect that certain patterns, if practiced regularly in order to become a habit, will eventually lead to the desired outcome of new neural networks in the brain.
Train your mind, change your brain