There was a long thread in the FB forum about Bong Sau and shoulder problems. I thought I would repeat I here what I said there in case it can be useful for people.
Someone said they were told if you try to bear too much weight or force through your Bong that it can cause a shoulder impingement. But it is not so much the bearing of weight through the Bong Sau as it is the height of the Bong Sau that causes shoulder impingement. If you want to be "shoulder friendly", don't raise the elbow of the Bong any higher than the shoulder. It should be just below shoulder level. There is a shoulder impingement test we use in orthopedics called the "Hawkin's Test"....and you guessed it....it is essentially putting the patient into a Bong Sau position!
When people talk about being able to hold a lot of pressure or force with a Bong, I suspect they are actually doing more of a Lan Sau. If your elbow is below the height of your shoulder, you have the joint in a "closed pack" position, and the force is going straight up the shaft of the humerus....in my mind this is a Lan Sau regardless of the angle of your forearm.
If you keep the shoulder joint in a "closed pack" position, this helps prevent wear and tear on the shoulder from impingement or from overloading the rotator cuff. This means that you fire the shoulder girdle muscles (including the rotator cuff) so that the head of the humerus is held seated in the glenoid fossa of the scapula (cup of the shoulder blade) like it is supposed to be. How do you do this? The better question is "how do you NOT do this?"!! This is one of the bad results of the dreaded "Wing Chun slouch." You've all seen it. This is when someone is doing Chi Sau with a slouched posture with their back all rounded, their chin forward, and their shoulders extended forward for the roll. This takes the shoulder joint out of "closed pack" position because it moves the head of the humerus forward out of alignment with the scapula and makes the joint more vulnerable to injury. Stand up straight, keep the chin back, fire your rhomboids to keep your shoulders back and you will take a lot of stress off of the shoulder joint. Never try to roll with a Bong Sau raising your elbow very much above the height of your shoulder. This IS shoulder impingement almost by definition! This is squashing your rotator cuff between the head of your humerus and the acromion (side tip of the shoulder blade). Over time this wears on the rotator cuff and can produce a degenerative tear in the tendon.
So "Bong" healthy! ;-)
Someone said they were told if you try to bear too much weight or force through your Bong that it can cause a shoulder impingement. But it is not so much the bearing of weight through the Bong Sau as it is the height of the Bong Sau that causes shoulder impingement. If you want to be "shoulder friendly", don't raise the elbow of the Bong any higher than the shoulder. It should be just below shoulder level. There is a shoulder impingement test we use in orthopedics called the "Hawkin's Test"....and you guessed it....it is essentially putting the patient into a Bong Sau position!
When people talk about being able to hold a lot of pressure or force with a Bong, I suspect they are actually doing more of a Lan Sau. If your elbow is below the height of your shoulder, you have the joint in a "closed pack" position, and the force is going straight up the shaft of the humerus....in my mind this is a Lan Sau regardless of the angle of your forearm.
If you keep the shoulder joint in a "closed pack" position, this helps prevent wear and tear on the shoulder from impingement or from overloading the rotator cuff. This means that you fire the shoulder girdle muscles (including the rotator cuff) so that the head of the humerus is held seated in the glenoid fossa of the scapula (cup of the shoulder blade) like it is supposed to be. How do you do this? The better question is "how do you NOT do this?"!! This is one of the bad results of the dreaded "Wing Chun slouch." You've all seen it. This is when someone is doing Chi Sau with a slouched posture with their back all rounded, their chin forward, and their shoulders extended forward for the roll. This takes the shoulder joint out of "closed pack" position because it moves the head of the humerus forward out of alignment with the scapula and makes the joint more vulnerable to injury. Stand up straight, keep the chin back, fire your rhomboids to keep your shoulders back and you will take a lot of stress off of the shoulder joint. Never try to roll with a Bong Sau raising your elbow very much above the height of your shoulder. This IS shoulder impingement almost by definition! This is squashing your rotator cuff between the head of your humerus and the acromion (side tip of the shoulder blade). Over time this wears on the rotator cuff and can produce a degenerative tear in the tendon.
So "Bong" healthy! ;-)