How are the students doing at sports?学生们的体育怎么样

今天的几个句子是有关体育的：1.I'm worried about the long-distance runners. 我正担心长跑呢。2.You mean it's not easy for girls to complete? 你是说女生很难达到要求？3.Are they any good at running the100m sprints? 一百米怎么样？