: to spread by metastasis â¦ all ten were primary brain cancers; that is, they had originated in the brain, and not metastasized there from elsewhere in the body.âPaul Brodeur, The New Yorker, 9 July 1990.
PNF stretching, or proprioceptive neuromuscular facilitation stretching, is a set of stretching techniques commonly used in clinical environments to enhance both active and passive range of motion in order to improve motor performance and aid rehabilitation.uring the 1960s, the physical therapy departments of several universities began offering courses in PNF and by the late 1970s PNF stretching began to be used by athletes and other healthy people for more flexibility and range of motion.
Another benefit of dynamic stretching is that it prepares the muscles and joints in a more specific manner since the body is going through motions it will likely repeat in the workout. It also helps the nervous system and motor ability since dynamic motions do more to develop those areas than static stretches.ynamic stretching increases range of movement, blood and oxygen flow to soft tissues prior to exertion. Increasingly coaches and sports trainers are aware of the role in dynamic stretching in improving performance and reducing the risk of injury.