That’s a pretty useful discounted hurdle timing conversion, I used to just compare the times to similarly discounted runs when I was timing myself in practice all the time last year.
I start at 30cm, and move them out 5cm about every 2 weeks. It’s quite possible that I could just start at normal distance, but in the past it just feels sluggish, especially in the November/December time frame, when I’m only working on acceleration.
As for individuals, I can’t speak with much credibility, as most of my experience is from my own workouts/experiences, and I have limited coaching familiarity. I would think that the difference between race height and a lower height wouldn’t have as much of an effect on women’s hurdles than it would on men’s. For a 5’10” girl, 30″ or 33″ would still be well below their inseam, whereas I would think that a 6′ guy would have to raise himself up over 39″ a little bit (I’m 6’4″ so not entirely sure).
I see. 30cm isn’t that much of change so I can’t see it hurting.
Sorry, in my example I tried to condense a lot of information into a couple sentences. The 5’10” girl could do a lot of things in theory that she didn’t do in practice. We probably had 100+ practices together. When I first got her, her hips were raising maybe a foot over the hurdle. Regardless of the distance, it was still way beyond what you would expect from a girl so tall. After dropping the hurdles to 30″, she continued to soar above the hurdle, but it was roughly 3″ lower overall. But if I brought it back up to 33″, she would go right back up those 3″. Over time, she got used to 30″, and would clear a 30″ and 33″ hurdle the same way.