Lead-leg drills
Your lead leg decides how fast you get over the barrier and back down, and none of that needs a hurdle. Wall lead-leg snaps, hand against a wall, drive the lead leg up to clearance height, then snap it back down fast, train the exact timing you need without any risk of clipping something. Band-resisted marches add load to the same pattern, so the hip flexor gets stronger at the same speed the drill demands. Both are quiet enough to do in a garage.

