By Nick Ng
You may remember when you were a kid or teenager, your parents told you to sit or stand up straight or don't slouch or you'll hurt your back. However, this idea that hunching or having too much lordosis alone can cause back pain is not supported by current research. In fact, many studies in the past 25-plus years show very little or no association between posture and back pain. (1)
By Nick Ng, BA, CMT
A recent study published in the Journal of Shoulder and Elbow Surgery challenges the existing idea that shoulder impingement syndrome (SIS) is caused by compression between the coracoacromial arch and the humerus during shoulder elevation above the shoulder height. Oftentimes, patients with SIS tend to have anteriorly tilted shoulders, causing the typical hunching posture. (1) Nine fresh cadavers were used where one scapula and one humerus — along with the rotator cuff muscles, subacromial bursa, and coracoacromial joint capsule — were amputated from the body and were mounted on a contraption that specifically measures a shoulder's range of motion within a given plane of motion.