In swimming, “MS” typically stands for “Medley Swim.” This term refers to a race format where swimmers compete using a combination of different strokes. In competitive swimming, the individual medley (IM) event involves a swimmer performing four different strokes in a specific order: butterfly, backstroke, breaststroke, and freestyle.
In the context of team relays, the medley relay involves teams of four swimmers, with each swimmer swimming a different stroke according to the same order. The medley format is designed to test a swimmer’s versatility and proficiency in all four competitive swimming strokes.
In some contexts, “MS” can also refer to “Masters Swimming,” which is a program for adult swimmers who want to improve their skills, compete, or simply stay fit.
If you have a specific context in mind regarding “MS” in swimming, please let me know!