I love that you bring up Elliot Hulse. Bio-energetics is is much more than just stretching, there is a lot of breathing involved too.

I practice a lot of yoga and stretching has become part of my life.

When I used to go to the gym I never stretched, after a year or so of doing this I started to notice my body was getting very stiff.
So these days I have a 5 minute stretching sequence before my workout, related to the bodyparts that are involved and my performance and general well-being has seen great improvement.