I don’t follow any particularly strict dietary restrictions. I occasionally eat sweets or things that might be considered unhealthy. However, I pay very close attention to my bowel movements. Their color, shape, and consistency are remarkably stable, almost every time.
What I focus on is the output, and how well my body processes and digests what I put into it.
Good output is an indication that the entire process is functioning well: what we take in, the organs responsible for digesting and absorbing it, and the body as a whole.
When our physical condition is stable, our mental state also becomes more stable. This creates an even better cycle between body and mind. I believe this is one of the most important things in life.
The same principle applies to yoga.
Theory is important, of course, but the practice that allows us to understand, digest, and truly integrate that theory is even more important. This is what enables us to achieve a higher level of performance.
Theory alone is like a blueprint that is never brought to life. It may look good on paper, but it has little practical value unless it is put into practice and fully understood through experience.
No matter how much information we take in during a class, without reviewing, practicing, and allowing ourselves time to digest what we have learned, we will simply continue reproducing the same flawed patterns, essentially making incorrect copies of what we were taught.
Ultimately, what matters is not how much we take in, but how well we digest, integrate, and transform it into something meaningful.
Keep practicing until it becomes second nature!
In scapulohumeral rhythm, raising the arm combines upward rotation of the scapula with elevation at the glenohumeral joint in an overall ratio of about 1:2 (at 180° of elevation, about 60° comes from the scapula and 120° from the glenohumeral joint). During roughly the first 30°, most of the motion occurs at the glenohumeral joint; beyond that, the scapula contributes a larger share. The position in which the long axis of the humerus lines up with the spine of the scapula is called the zero position; in this video it occurs at about 138° (reported values range from about 130° to 155°, with individual variation). In the zero position, the lines of pull of the rotator cuff and other muscles align with the humeral axis, so almost no rotational force acts on the humerus, and the glenohumeral joint is considered to be in a stable position.
Raising the arm relies on two main force couples. The first is the deltoid and the rotator cuff: the deltoid lifts the humerus while the rotator cuff draws the humeral head downward and into the glenoid, so the arm rises with the head kept centered in the glenoid. The second is the trapezius (upper and lower fibers) and the serratus anterior, which rotate the scapula upward and turn the glenoid to face upward. Working together, these two force couples allow the arm to be raised smoothly.
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