Core Strength Vinyasa Yoga is a style of yoga as exercise created by American yoginiSadie Nardini in 2006. Central to this style is a movement referred to as a 'wave' (softening). The structure of this practice includes a 7-step framework which is applied to each pose within a sequence. Nardini incorporates aspects of Kundalini Yoga, Sivananda Yoga, Anusara Yoga, Iyengar Yoga, and portions of movement sequences from Ashtanga Vinyasa Yoga. Maintaining an internal focus on joy in the moment is part of the practice philosophy. This style integrates postures with learnings from many disciplines including physics, biology, and geometry, influenced by the works of Leslie Kaminoff. It incorporates traditional yoga philosophy from the ''Yoga Sutras of Patanjali''. It emphasizes muscles that are deep within the body and includes the use of 'waves' in order to enter and exit poses. Examples include physical moves that activate muscles close to the spine—such as psoas and quadratus lumborum in order to build support for the body from within before generating outward expression of that movement.
The purpose of deep core focused poses in this practice is to improve and deepen breathing. This perspective differs from other styles in which the purpose of deep core work is to stabilize the back. In this practice, keeping belly soft and core strong improve breathing. "Belly Bonfire" breath is one example of a deep core breath technique that involves focus and target of attention and breath with softer abs. Pelvis is viewed as the body's physical center of gravity in this system.
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