Freestyle, also known as front crawl, is the most common and fastest swimming stroke, allowing swimmers to use any stroke they choose.

Typically, a heat consists of eight swimmers, although this number may vary depending on the competition format.

Swimmers must be at least 14 years old to compete in international swimming competitions.

Backstroke is a swimming stroke where swimmers lie on their backs and use alternating overhand strokes and flutter kicks.

Olympic swimming pools are 50 meters in length.

A false start in swimming competitions results in immediate disqualification.

Butterfly stroke is characterized by a symmetrical arm stroke and a dolphin-like leg kick.

International swimming competitions require a minimum pool depth of 2.0 meters.

Each country is allowed to enter a maximum of two relay teams in swimming competitions.

Breaststroke is a swimming stroke that involves a breaststroke kick and a simultaneous overhand stroke.

Touching the lane line during a swimming race results in immediate disqualification.

A relay team in swimming competitions consists of four swimmers.

Butterfly stroke involves a continuous underwater dolphin-like kick and alternating overhand strokes.

Swimmers must be at least 12 years old to compete in national swimming competitions.

During a butterfly stroke turn, swimmers are allowed a maximum of two strokes.