Why does learning freestyle hurt your shoulder?

For freestyle beginners, insufficient lateral rotation, wrong entry and excessive paddling will all increase the burden on the shoulders, which will all cause internal pain or muscle soreness in the shoulder joint. If the action is not improved, it will swim out of the swimming shoulder over time. Swimming shoulder is called "shoulder impact syndrome" in medicine. The specific medical explanation is rough, and I don't quite understand it. In short, it is caused by the heavy burden on the shoulders.

First of all, not enough sideways. When most beginners swim freestyle, they are basically in the following 1 state, basically not sideways, but completely pull out their arms through their shoulders and do arm waving, and this will not raise their elbows very high, so they can find a suitable position to let their hands enter the water. Therefore, to learn freestyle, we must control the core strength to do lateral rotation, which can reduce the pressure caused by arm movement on the shoulders.

The second is the wrong hand into the water. The fingertip of the middle finger should be put into the water first, not the thumb, which will relieve the shoulder pressure caused by excessive internal rotation of the boom. You can improve the speed of your hand entering the water by using paddles.

Finally, pushing too hard, rowing too fast and swimming too long can also cause shoulder pain. I once felt rotator cuff pain because I swam too hard.

I think the above three points are the root causes of shoulder pain in freestyle. In short, we should standardize the freestyle movement, don't swim too hard and too hard, and avoid swimming over the shoulder.