Short-range of motion and muscle failure

[Seabush]

I've noticed that when I do workouts (e.g., Callanetics, Lotte Berk, Bar Method, Margaret Richard, etc.) where there's a short range of motion I reach muscle failure very quickly. I'm assume that's because these workouts isolate the muscles in question in a way other workouts do not. Everything I've read advocates using a full range of motion when doing exercises. I'm curious to hear if others use this method partially or exclusively for strength training? Why? What benefits have you derived?

Thanks

Crystal