Hitting hurdles feels like a courage problem in the moment, but it is almost always a mechanics problem with a specific, findable cause. There are really only a handful of root causes: your takeoff distance is wrong, your lead leg is not clearing high enough, your trail leg is dropping too early, your body angle is off at clearance, or your stride pattern between barriers does not match your speed. The trouble is that from the athlete's side, most of these feel identical, they all just feel like hitting a hurdle. That is exactly why so many hurdlers spend a season drilling the wrong fix, working hard on lead-leg snaps when the real problem was their takeoff distance the whole time. Below is a symptom-to-cause table that separates lead-leg problems from trail-leg problems from spacing problems, with the specific drill and page for each one.
Standard 110m hurdles takeoff is about 7 feet from the barrier; 100m hurdles is about 6.5 feet. Takeoff too close forces your lead leg up and over the hurdle instead of forward and through it, which is what most stutter-stepping right before a barrier actually is. Mark the real distance and drill your approach to it before touching anything else.
A lead knee that clips the bar usually means it is not driving high or fast enough on the way up. A trail foot that clips the bar usually means the knee dropped vertically instead of staying tucked and horizontal across the bar. These are opposite legs with opposite fixes, wall lead-leg snaps for one, wall trail-leg snaps for the other, so diagnosing which leg is actually the problem matters more than doing generic hurdle drills.
If you clear the first two hurdles clean and start hitting the later ones, that is often a conditioning problem wearing a mechanics costume, your form is breaking down from fatigue, not from a flaw that was there the whole race. Separately, if you keep switching lead legs or losing the 3-step rhythm, your stride spacing does not match your current speed, which is a cone-rhythm problem, not a leg-height problem. Filming from the side is the fastest way to tell these apart, since fatigue-driven breakdown and a genuine mechanical flaw look different on video even when they feel the same from inside the race.
Hitting hurdles is the most diagnosable problem in track. Film one rep over a hurdle, side-on, 15 feet away. AI grades takeoff distance, lead-leg height, trail-leg position, and body angle at clearance. The frame where you hit tells you exactly which one is the cause.
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Match what actually happens on the barrier to its real cause. Most hurdlers guess wrong on this the first time.
| Symptom | Category | Likely cause | Fix |
|---|---|---|---|
| Clip the bar with your trail foot | Trail leg | Trail leg drops vertically instead of tucking horizontal | Wall trail-leg snaps, see hurdles trail leg |
| Stutter-step right before the hurdle | Takeoff/spacing | Takeoff too close, chopping stride to avoid crashing in | Mark the real 7 ft (110mH) or 6.5 ft (100mH) takeoff, see hurdle takeoff distance |
| Land well past the hurdle, off balance | Takeoff/spacing | Takeoff too far out, jumping rather than stepping over | Shorten the last two strides before the barrier |
| Lead knee catches the bar | Lead leg | Lead leg not driving high or fast enough | Wall lead-leg snaps, see hurdles lead leg |
| You pop upright or sit down over the hurdle | Body angle | Body angle too vertical at clearance | Forward-lean drill plus trail-leg wall work |
| Can't hold the 3-step rhythm between hurdles | Steps between | Stride spacing off for your current speed | Cone rhythm runs at your actual spacing, see hurdle drills without hurdles |
| Hit the same-side hurdle every rep | Lead leg | Consistent lead-leg height deficiency, not random | Repeat wall snaps, check hip mobility |
| Fine early, start hitting later hurdles | Fatigue | Form breaking down from fatigue, not a base flaw | Reduce spacing late in reps, build hurdle-specific conditioning |
Common questions athletes and coaches ask about this topic.
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