杰西·乔伊纳是女子七项全能世界纪录创造者。她从事田径运动训练已15年了,其中七年(1974—1980)她专门从事跳远训练。专项训练的最初几年,她在提高一些强项的同时,着重改进一些弱项(铅球和标枪)。1981年—1984年铅球和标枪的成绩分别增长15.77%和28.7%。在1985年—1988年整个奥林匹克周期,乔伊纳侧重提高一些强项的成绩,同时也保持一些弱项的成绩。于是,1985年在成绩水平很 Jesse Joyner is the world’s seven-man world record creator. She has been engaged in track and field training for 15 years, of which seven years (1974-1980) she specialized in long jump training. In the early years of special training, she focused on improving some weaknesses (shot and javelin) while improving some strengths. 1981-1988 Shot put and javelin scores increased by 15.77% and 28.7% respectively. During the entire Olympic cycle from 1985 to 1988, Joiner focused on improving some of his strengths while maintaining some of his weaknesses. So, in 1985 the level of achievement is very