The high jump is an athletics (track and field) event in which competitors must jump over a horizontal bar placed at measured heights without aid of any devices. It has been contested since the Olympic Games of ancient Greece. Over the centuries since, competitors have introduced increasingly more effective techniques to arrive at the current form. Javier Sotomayor (Cuba) is both the indoor and outdoor world record holder in this event with jumps of 2.43 m (8 feet) and 2.45 m (8 feet ½ inch), respectively. Sotomayor's record, set in 1993, is the longest standing in the history of the men's high jump. Stefka Kostadinova (Bulgaria) has held the women's world record since 1987, the longest standing record in overall history of the sport.