Exercise For Projecting Force | Kuo

One of the things that I find painful to observe when I go to the gym is watching people do squats.  It’s a basic movement that gets butchered since our sedentary lifestyles have made us forget how to move from the hips.  Instead, what happens when people squat is mostly poorly coordinated movements starting from the knees.  Rather than try to explain this in text, I find that Kelly Starrett’s video post about squatting is easier to visualize:

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So, what does this have to do with projecting force?

Well, joint sequencing in a squat movement has direct carryover to projecting force.  One thing I often notice with people first learning absorb-project is that the hip-knee coordination is off.  The knees drift forward first, followed by the hips drifting forward, and ultimately resulting in a forward lean with the weight on the toes.  Starting the movement from the knees moves the knee into a suboptimal angle for bearing force, which in turn puts unnecessary shear stress on the knee and shifts most of the movement load to the quadriceps.  There is also a tendency to lose suction on the kua when initiating from the knees.  This manifests as the front of the body opening up and the mingmen closing; consequently, the shoulders move backwards as the body is moving forward, which is an inefficient movement pattern for projecting force forward.  Projecting by initiating with forward knee movement results in movement that is off-balance, not harmonized, skewed towards a yang-only energy, and stresses the knees more than necessary.

 If we stick to I-Liq Chuan principles

…and project and expand from the mingmen to initiate the movement, we get joint sequencing more like a proper squat.  The mingmen and hips move back first, which keeps the knee in a better position. The aligned knee position allows axial force transfer through the joint, which minimize shear stress.  With the force moving more through the center of the knee joint instead of shearing out, the quads don’t have to work so hard counteracting knee flexion (bending) and can thus be more relaxed.  Moving from the hips first also distributes force to the strong posterior chain muscles (i.e. hamstrings and glutes) in addition to engaging the quads, so we get  harmonization of the yin and yang muscles.

Johnny Kuo

[Originally posted 3/13/12, MindBodyKungfu.Com]

The Body Line | Johnny Kuo

After the center of the feet, usually the first “easy” idea I teach to new students is paying attention to the body line. When the hand (or more precisely, the point of contact) is inside the body line, it is easier to absorb. Conversely, when the hand crosses outside of the body line, it is easier to project force. The body line is an important transition point which needs to be recognized to maintain unification with an opponent’s force.

It’s a simple concept that is easy to demonstrate. Just move the hand inside or outside the body line and try absorbing to pull or projecting to push against a partner’s force. The importance of recognizing open vs closed becomes evident just from the touch feedback. Absorbing while open or projecting while closed only generates power from the arms and is harder. Projecting while open or absorbing when closed links up more joints in the body and generates more power with less effort.

Why this should be the case might not be immediately obvious. A quick thought experiment can explain the body line transition. Imagine the shoulder as a center of rotation for the arm in the horizontal plane. The point at which the arm is at its front-most position is directly perpendicular to the body (i.e. at the body line). If we borrow some math from the previous post on spheres of offense and defense, we can treat the body line direction as a diameter line of a circle. As the arm crosses inside or outside the body line, the diameter line is crossed. The forward-back motion vector of the arm (i.e. the tangent the arc) switches sign upon crossing the body line.

Alternatively, we can use a clock as our circular motion model. When the minute hand goes from 9 to 12, there is an upward movement component. Exactly at 12, there is no upward or backward movement component. After 12 is passed, the minute hand has a downward movement component. Once the hand crosses the transition point, there is a change from a forward to backward movement.

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Of course, the human body does not move strictly according to rigid body mechanics, and movements usually involve several joints. The simple analysis is imperfect, but it serves as a rough approximation for understanding the mechanics.

Johnny Kuo

MindBodyKungfu.Com

(Originally post. 2/17/2011)