Elizabeth Marks Broke a Record and Won a Medal in Tokyo — Read More About the Paralympic Swimmer

In para swimming, Marks competes in the S6, SB6, and SM6 classifications. The "S," "SB," and "SM" prefixes stand for the strokes: "S" is freestyle, butterfly, and backstroke. "SB" is for breaststroke, and "SM" is for the individual medley. The numbers identify what type of impairment the athlete has; the classifications S1/SB1/SM1 - S10/SB10/SM10 are events for athletes with a physical impairment and S11/SB11/SM11 - S13/SB13/SM13 is for athletes with a vision impairment. Athletes with an intellectual impairment are classified as S14/SB14/SM14.