自从1891年詹姆斯.奈斯密史先生发明兰球运动以来,它已经历了许多更新,除了规则变化以外、跳投是这些变化中主要的一项。初见到的兰球比赛采用双手投篮,出手部位较低。由低部位改用原地双手胸前投篮比低手投篮更难于防守。数年以后,有少数运动员发现他们可以用单手投篮把 It has undergone many updates since 1891 when James Knightly Smith invented the Lancashire game. In addition to the rule changes, jumpers are the major of these changes. Lan Yu first seen the game with both hands and shot, shot a lower part. From the low part of the switch to the hands chest chest shot more difficult to defend than the low shot. A few years later, a few athletes found they could shoot with one hand