先せん頭とう集しゅう団だん

noun

leading group; leading pack

Used especially in sports such as marathons, cycling, and long-distance races to refer to the front group of competitors.

• マラソンでは先せん頭とう集しゅう団だんがペースを握にぎっている。

  In the marathon, the leading pack controls the pace.

• 先せん頭とう集しゅう団だんから遅おくれずについていく。

  I keep up with the leading group without falling behind.