Swimmers frequently report that they have shoulder pain. because Chances are you've experienced shoulder pain or discomfort in your swimming life.
No swimmer works hard, swimming lap after lap, aiming to develop a shoulder injury, but that may be the cause of swimmer's shoulder. Lap after lap, done with the wrong swimming technique, too often or too fast, can injure a swimmer's shoulder muscles or joint.
Simple as at it seems, overdoing it can result in swimmer's shoulder. Adding to much swimming too soon - failing to do a gradual, prudent buildup - or adding too much load too soon - not an increase in distance, but doing something like adding a lot of hand paddle swimming or pulling - can result in an overuse to a swimmer's shoulder, injuring that shoulder and stopping the swimmer from swimming.