Gweilo
Master Black Belt
One thing I don't agree with is the whole being relaxed when you strike thing. The theories good and fine for training but if I'm attacked late at night I am not going to be relaxed at all
The 2 questions you have are linked, what happens to your body when you get scared, or when your body gets tired, as you breath harder, your chest stomach and shoulders move more, your body will fill with tension, once tension is within the body, your mind and muscles have to work harder to compensate, which brings more fatigue, more doubts which = more tension.
Systema breathing is a process where you teach yourself to combat this by using breath techniques through training and every day life, we learn to take the right amount of oxygen for the work we do, and also techniques for recovery, the better you breath the you can keep the tension at bay, the freer and more natural you move, to give a simplified example, watch a dad play fight with his son, dad is relaxed, no matter how hard the child tries dad has it covered, dad is confident in his movement, that process of being relaxed, confident, moving freely, is what we are aiming for in our work, our striking is done differently, it is similar to the Wing Chun relaxed punching with a difference, heavy and at different depths.
Our techniques will be familiar to other MA, we do not use blocks like you see in arts like Karate etc, but with our natural movement we avoid, blend, deflect, we have ground techniques, on guard, half guard, escape, and on the floor is the only time we may use tension, in a choke, blood hold, or other form of submit ion. We use takedowns that can be locks, structure manipulation, we seldom use sweeps as we prefer to counter attack when the body is most vulnerable, for example a front kick, we will avoid, deflect, and strike the lead leg just before it lands, our techniques are counter attack and are done with free natural fluid movement, that is in directly linked to our breathing.