In swimming, athletes are categorized into various sport classes denoted by a prefix “S” or “SB” followed by a number. These prefixes correspond to different strokes:
• S: Includes freestyle, butterfly, and backstroke events.
• SB: Specifically for breaststroke events.
• SM: Pertains to individual medley events, calculated as (3xS + SB)/4 for most classes, with adjustments for certain classes (2S + SB)/3 for S1-4.
Sport Classes S1-S10: Physical Impairment
Athletes with physical impairments are assigned one of ten sport classes (S1-S10), with lower numbers indicating more severe limitations. The allocation of classes is based on the impact of the impairment on swimming performance rather than the impairment itself. Classifiers evaluate functional abilities through a point system and water assessment. Notable class examples include:
• S1 SB1: Severe loss of muscle power or control in legs, arms, and hands, often using a wheelchair.
• S2 SB1: Rely heavily on arm strength due to limited function in hands, trunk, and legs.
• S3 SB2: Include athletes with bilateral amputations or severe coordination issues.
• S10 SB9: Minimal impairments, such as single hand loss or hip movement restrictions.
Sport Classes S/SB11-13: Visual Impairment
Athletes with visual impairments are classified into three classes:
• S/SB11: Very low visual acuity or no light perception.
• S/SB12: Higher visual acuity or visual field less than 5 degrees radius.
• S/SB13: Least severe visual impairment with visual field less than 20 degrees radius.
Safety measures like blackened goggles and the use of a tapper are enforced for S/SB11 athletes.
Sport Class S/SB14: Intellectual Impairment
Athletes in this class exhibit intellectual impairments affecting pattern recognition, sequencing, memory, or reaction time. These impairments impact overall sport performance, leading to distinct swimming characteristics compared to able-bodied elite swimmers.
Each classification ensures fair competition while accommodating diverse impairments, fostering inclusivity in swimming events.