I could have misunderstood, but if you are comparing the whole-leg-boleo and the below-the-knee-boleo, I will rephrase what I said before, because I believe it applies to linear boleos, too: I believe that if the follower's "free" leg is really free and relaxed, then by increasing the energy of the lead we can only increase the final height the follower's leg will reach as a whole. At the end the foot swings some more due to the conservation of angular momentum and the fact that the leg is relaxed. I don't understand why the follower would choose to allow only one half of her leg to be free (apart from the obvious lack of space and the potential danger a free leg can pose, but I believe we're all aware of that). It seems to me that it takes effort (=tension) to keep the thighs together during a high-energy boleo, linear or circular. I believe this tension could cause discomfort to both dancers (but not necessarily). I.e. my question is: is there a special way to "lead" the follower into making a boleo only from below her knee, or is it a matter of her choice and style? My opinion: her choice, because I only see the whole-leg boleos around here. We've been taught that way and I lead only those (the circular way).