I had the first of 4 session on academic skills with the first yr performing art students today that focused on their physical preparation with regards to a warm up. I have always started with the practice of release. What I did was introduce them to some practical techniques regarding the phenomenal encounter of release, which I have broken down into 3 bits
1 The release that is a result of letting go, concerning one's breath after breathing in; and how it affects the quality of effort and relaxation
2 The release that results from a fall in movement and its smooth recovery
3 The release that is a created after the relief from a good and demanding stretch that will align the
There are more examples, including the release the comes after an emotional outburst and the release that comes after physical exertion. But I chose to concentrate the above 3 as it allowed me to focus on posture and alignment.