Yoga is not just about standing on our head or bending in all sorts of contorted positions. It is the uniting of body, mind, and spirit, encouraging a full experience of the intricate relationship between them and how to bring this relationship into balance. Ultimately, yoga is about self realization, true freedom, where the individual self merges into the universal self.
It aims to achieve this through a series of physical and mental exercises. At the physical level, the methods comprise various yoga postures that aim to keep the body healthy. The mental techniques include breathing exercises and meditation to discipline the mind.
Absolutely! Many postures out there have modifications to help accommodate for lack of flexibility. The great thing about yoga is that it is not all about flexibility and stretching. Much of yoga is about finding balance, strength and listening to your own body's limitations.