The heart-racing obstacle course competition series "American Ninja Warrior" premieres for its eighth season this summer. The action-packed series follows competitors as they tackle the world's most difficult obstacle courses in qualifying and finals rounds across the country. Those that successfully complete the courses in each city will move onto the national finals round in Las Vegas and compete for a $1,000,000 prize. Four of the six obstacles on the Los Angeles course will be new to "American Ninja Warrior." For the first time, competitors will face the Floating Steps, Tic Toc, Escalator and Ring Jump. Veteran Ninjas Kevin Bull, Jessie Graff and Grant McCartney return for another shot at completing the course. Matt Iseman and Akbar Gbajabiamila return as hosts as Kristine Leahy co-hosts. 　　译文(2): 令人心跳加速的障碍赛系列《美国极限体能王》将于今年夏天第八季首播。这个动感十足的系列赛追随着参赛者，他们在全国各地的资格赛和决赛中，攻克了世界上最难的障碍赛道。在每个城市成功完成课程的选手将进入拉斯维加斯的全国总决赛，争夺100万美元的奖金。洛杉矶赛道上的六个障碍中有四个是“美国极限体能王”的新障碍第一次，参赛者将面对浮动台阶、抽动台阶、自动扶梯和跳环。老忍者凯文 · 布尔、杰西 · 格拉夫和格兰特 · 麦卡特尼再次回到赛场，争取完成比赛的机会。Matt Iseman 和 Akbar Gbajabiamila 作为主持人作为 Kristine Leahy 的合作主持人回归。