Swimming: is based on speed in water. There are different events like free style, breast stroke, back stroke and butterfly.
The free style races are 50m, 100m, 200m, 400m, 800m, 1500m and 10000m. The 1500m is only for men and the 800m is only for women. The breast stroke and the back stroke are 100m and 200m events and the 200m and 400m have all four strokes (back stroke, breast stroke, butter fly and free style).
The race is completed by 4 x 100m freestyle, 4 x 200m freestyle and 4 x 100m medley relays.
The qualifiers of the preliminary heat in the 50m, 100m and 200m move to the semi-finals and finals. In the relay and individual events of 400m and above, the eight fastest finishers move directly to the finals, and all the decisions are based on the fastest times.