(I meant to get this posted last week, but I lost my connectivity in the airport.)
There is a lot of talk around stability and its importance for shooters. I recall one coach who would observe athletes and say "You have some body sway." After that cryptic statement, he had nothing to offer. He was very knowledgeable, but there wasn't much on the subject of stability twenty years ago. Unfortunately, that seems to be the standard for sway discussions. Athletes have a problem and need to fix it.
Fortunately, over the last decade, there has been a lot of research into sway. To get at that info, we need to look at sources outside of the usual suspects for shooting knowledge. In short, we need to investigate static postural stability and the mechanisms that support that from a physiology perspective. What follows are my notes, in layman terms on a complex subject. I'm an ISSF coach with the NCDS and not a kinesiologist. As with anything you read on the internet, buyer beware.
Essentially, we need to look at two general systems: the mechanical system (muscles, joints, etc.) and the feedback systems.
From a mechanical system, physiology tells us a few things. Stability or sway control takes place at two primary locations: the ankles and the hips. You lean forward or backward at the ankles. You bend around the hips: right, left, forward, backward. These two areas are manipulated to get you into a stable, static position.
As John mentioned above, foot placement has an impact as well, increasing or decreasing your base of support, as well as changing tension through the ankles.
You could consider lowering your centre of gravity, by widening your stance and lowering your torso; BUT, this increases muscle tension in your legs. Research shows that as muscle tension increases, so does tremors in the body. Also, fatigue comes into play. As your match progresses, you may need to adjust your stance. This affects your consistency. In general, I think that a lower centre of gravity (apart from being short - something for coaches to consider during talent selection) is a losing strategy.
The mechanical system must also incorporate your musculature. Often we hear about developing core strength. That's great advice, but to what purpose? Core strength is manifested in a number of ways. We need to focus on postural stability. Generally speaking, a shooting athlete needs a solid midsection and back, plus all the stabilizers through the legs, pelvic girdle and trunk.
Additionally, the pistol shooter has another area of instability, through the shoulder. We need to attach the arm to the trunk and the shoulder is the weak link. Consequently, the shoulder girdle needs to be strong and toned equally. Also, the shoulder blade needs to be fit, held securely in place and stabilizing the arm.
So, the mechanical system is in place. Now what? You need feedback to control the body. This takes place through your central nervous system, through some subsystems. The first interface is the proprieceptive system which receives a great deal of information through the soles of your feet. Your feet detect changes in intensity and location of pressure across your soles. This tells your body when and where you are swaying toward. That information is relayed back to your brain to tell you to correct your position.
Similarly, your inner ear or vestibular system is like an extremely complex spirit level. It detects movement in multiple planes and, like the soles of your feet, relays info back to the brain to correct position. This highlights the need for an erect head position. Tilting the head alerts the vestibular system, requesting stability corrections. These false alerts could also mask legitimate alerts about instability. Good head position leaves the system available for detecting real body shifts which need correction.
The last monitoring system of note is vision. Your eyes register objects and your proximity to them. When standing, your movement is detected through minute distance changes between you and what you see. This works for objects in your primary focal plane and within your peripheral vision. (Research shows that people are more stable standing close to a wall than in the middle of a room.) When you visually detect movement, again, that information is relayed to the brain, where a response is selected and activated. This knowledge brought up an interesting question in my mind regarding the use of blinders, which effectively negate the visual feedback systems. Athletes who suffer from visual distraction control should use blinders or learn how to shut them out. Otherwise, ditch the blinders and allow the visual monitoring systems to do their work.
These monitoring systems work together to give your brain the best information for detecting movement. More quality information results in better responses, consequently a more stable stance. As such, the shooting athletes needs to bring all these systems into their performance for superior stability. Like every other aspect in our sport, these systems can and must be trained, either to activate or improve them.
I'm not going to get into the exercises here, but if you're interested in learning more, I'm hosting an airgun training camp at the Camp Perry Marksmanship Training Centre, in Port Clinton, Ohio, on the November 6/7, 2010 weekend. Among the presentations and shooting, there will be sessions on developing stability. The camp is intended for Canadian athletes, but, there are a few spaces available for our friends. If you're interested in attending, please contact me at
haynes@targetshooting.ca
Patrick Haynes
Pistol Coach / Canadian Forces CISM Shooting Team