Refers to the track and field event involving running and jumping over hurdles.
彼はハードル競技で全国大会に出場した。
He competed in the national tournament in the hurdle race.
ハードル競技はオリンピックの正式種目です。
Hurdling is an official event in the Olympics.
Compound of ハードル (from English 'hurdle') and 競技 (competition, event).