I love the full and firm explanation of what Vinyasa is about by Tim Feldman. Specifically, that he talks about the importance and integration of body locks (bandhas) in your class.
Postures are linked together through flowing movement (vinyasa). Vinyasa means breath synchronized with movement. In Ashtanga Yoga the movement is always synchronized with the breath and there is never a separation between the two actions. When the synchronization of movement and breathing is an integral part of the yoga practice and the three body locks (Moolabandha, Udiyanabandha and jalandarabandha) are applied, an internal, purifying heat is generated in the body. Unwanted toxins are released and disposed of, vital hormones and minerals flow into the bloodstream and the nervous system is purified. The result is a light and strong body.Text written by Tim Feldmann and approved by Pattabhi Jois, and his grandson, Sharath Rangaswami.