noun - An adult swimmer is an adult who participates in informal or formal adult swimming training programs, masters swimming programs, or competitive swimming events in the pool or an open body of water.
The masters swimming events include competitions in a pool (short-course yards, short-course meters, long-course meters) or in open bodies of water (e.g., oceans, lakes, bays, rivers). It is a fast-growing leisure and competitive activity.
Masters swimmers compete within age groups of five years: 19-24, 25–29, 30–34, 35–39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75-79, 80-84, 85-89, 90-94, 95-99, and 100+.
U.S. Masters Swimming
United States Masters Swimming is the governing body of masters swimming in the United States, sponsoring competition at all levels both in the pool and in the open water. In addition, it sponsors programs for non-competitive "fitness" swimmers who train primarily for the health benefits that the activity offers to the aging athlete.
Masters Swimming Canada
Masters Swimming Canada is the governing body of Masters Swimming in Canada, listing swim clubs, competitions and provincial master swim associations.