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171217 Is your grip width destroying your shoulders? (1 of 2)
Where you grip the bar may be the best predictor of how you will injure your shoulders. Research in England has determined that certain widths related to a person’s body size may increase your chance of becoming injured while performing the bench press. A closer look at the anatomical structure of the shoulder may help to explain why this is such a common occurrence.
The shoulder, unlike the hip joint which is a true ball and socket joint, is a semi and shallow ball and socket joint. This means the skeletal bones directly involved in the bench press motion are not mechanically secure. Unlike the hip, the integrity of the shoulder primarily relies on the muscles, ligaments and tendons to keep it intact and not the joint structures. Incidentally, in some literature the shoulder is not even considered a true joint. I consider the shoulder as a joint and as such will continue to refer to it as one.
One of the main primary structures within the shoulder is the glenohumeral joint. When bench pressing this part of the shoulder supports the weight and is subjected to the constant heavy loads of the active lifter.
While benching wide with the upper arms at or near perpendicular to the upper torso the shoulders are placed into external rotation. According to the research ‘ninety degrees of abduction combined with end of range external rotation has been defined as the “at risk position” that may increase the risk of shoulder injuries.’
Continued next week.