Farris,
what you have just posted is a copy from the peak performance website, a website that looks at increasing performance in athletes, and it was published in 2000.
No news there - and certainly no help to Physios who ask about chest clearance techniques.

Ester has given the PNF website. Have a look yourself. PNF is far more than a simple contract relax stretch.

Regards,
Fyzzio