Simultaneous movement between the scapula and humerus is referred to as Scapulohumeral Rhythm. The shoulder has three degrees of movement, 1 degree (60 degrees) in the ST joint and two degrees (120 degrees) in the GH joint. Motion must be distributed evenly between the two joints in order to achieve full range of motion. Having the two joints working together, limits the stress put on a singular joint. It is important for the two joints to be congruent with one another so the two structures may move synchronously. The scapula plays a huge role in stabilizing the GH joints in order to achieve total motion. Each joint contributes to the total amount of movement that may take place at the shoulder, therefore, dysfunction at one will result in decrease of ROM due to the increase risk of impingement, pain, and overall function. Scapulohumeral Rhythm ensures the healthy length-tension relationships of the two structures while moving together and acting against force.
Posture encompasses the position of the head, limbs and trunk and ultimately allows our muscles and organs to function optimally. When discussing posture, it is also important to note the role of one’s Center of Gravity and Base of Support. It is important to keep our COG over our BOS in order to maintain postural control. The body is more stable when we have a larger BOS, or support surface, and therefore can majorly impact the way we move our body in order to reach a fixed and supported position. Here are 4 reasons why it is so crucial to teach proper posture and body mechanics to an individual, or future client, who has poor posture. 1.) Statistics show that 80% of adults will at some point experience back pain, and 90% of the time the low back pain will return or be recurrent. It is also important to note that the average age of experiencing this pain can begin as early as 30 years old. Many of these statistics could be avoided with the implementation of proper body mechanics w...
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