KennethKu
2nd Black Belt
PAUL said:"Medical Textbooks" is a bit vague. I understand the terms you've listed, but I haven't read a medical resource that has made the arguement that your muscles are already flexable, and that it is ONLY your nervous system that inhibits your flexability (although, I have heard that of neural inhibition as being one of several factors).
If it was only neural inhibition, then why would we pull muscles when we are stretched too far beyond our "neural inhibition."
Muscle tear occurs when the stretch reflex kicks in to protect the tendon, at the expense of the muscle. (Tendon tear takes fiorever to heal.) A muscle that is stretched too fast and/or far by an external force, will contract to oppose the stretch. A stretch + a contraction = muscle tear. It does not even have to be maximally stretched for the tear to occur. As soon as the nervous system sense a danger of tendon tear, the stretch reflex kicks in, triggering a contraction.
So, the objective is to strengthen the muscle and to tune down the stretch reflex. This is where relaxed stretching (yoga style) fails. Relaxed stretching does not strengthen the muscle. Isometric stretching strengthens the muscle. A strong muscle has less sensitive stretch reflex. There is less need for the nerve system to intervene as it senses that the muscle is strong enough to main control.