There are three judges who oversee successful completion of each lift. If a judge deems a lift to be successful, that judge shines a white light; if a lift is deemed unsuccessful, a red light is shown. The bar must be lifted to at least knee level within 60 seconds of the bar being loaded or the lift does not count. If the competitor is making two consecutive lifts, they are permitted 120 seconds for the second lift.
Weightlifting is an individual sport in which competitors attempt to lift heavy weights mounted on steel bars. Weightlifting can be practiced competitively or for training purposes. Competitive weightlifting is a sport where competitors lift weights mounted onto metal barbells and perform two lifts: the snatch, and the clean and jerk. Weightlifting has been a regular Olympic sport since 1932.
Weightlifting has existed since the beginning of recorded history; a 5,000-year-old Chinese text tells of potential soldiers having to pass lifting tests. The Greeks have sculptures that depict men in the act of lifting heavy stones. In 1896, competitive weightlifting was included in the first modern Olympic Games. Since 1932 it has become a regular Olympic event.