Figure skating jump specialist Nick Perna compares the 2 different types of take-offs we see for the lutz jump. In the video he is comparing a triple lutz take-off by 1998 Olympic Champion Ilia Kulik and a triple lutz take-off by 2018 Olympic Silver Medalist (and 2-time World Champion) Evgenia Medvedeva. Although there is more to the technical differences of these take-offs, the main point is to observe how Evgenia is facing completely forward with her entire body at the moment of lift-off, while Ilia has dramatic rotation of the shoulders ahead of the hips which are actually blocked and not facing forward.
花滑跳跃专家Nick Perna比较了两种勾手跳起跳方式。视频里分别是98年男单奥运冠军库里克和18年女单奥运亚军梅娃的3lz。两人技术差异很多，最主要的一点是梅娃起跳时整个身体转到前方，而库里克虽然肩膀转动幅度较大，胯部方向却很方正，没有转到前方。
Nick notes that male skaters more commonly use the blocked method, simply because they can jump higher and make up for the inefficiency of the lower body position at take-off with more air time. Many if not most female skaters (especially non-elite female skaters) performing triple lutz tend to take-off like Evgenia since they typically have lower air times and must pivot all the way to forward before lifting off the ice or they will not be able to complete the necessary rotations in the air.
Nick说：男选手较多使用方正式跳法，因为他们的跳跃高度和滞空时间可以弥补下肢姿势导致的转速不足。大多数女选手，特别是业余选手更多使用梅娃式跳法，因为她们滞空时间较短，只有在刀齿上多转才能完成周数。
Nick offers a tip to coaches: If a skater is strong, athletic, and jumps very high and naturally takes off with the hips-blocked technique, let them continue to use that technique. But if a skater cannot jump very high but takes off using the hips-blocked technique, it may make sense to switch to the pivot-forward technique in order to have success with the jump.
Nick给教练的建议是：如果选手力量强、身体素质好、跳跃高并自然采用了方正式起跳，让他们维持原状就好。但如果跳跃较低的选手采用了方正式跳法，可能需要换成转体向前的跳法才能成功。
At the end, Nick also points out that the rocker of the picking foot should not be placed on the ice. If the skater drops from the toe pick onto the skate blade, the jump actually becomes a loop.
结束时，Nick指出点冰足的刀刃弧度部分不应落在冰上。如果选手从刀齿落到刀刃上，就不是勾手跳而是后外结环跳了。
花滑跳跃专家Nick Perna比较了两种勾手跳起跳方式。视频里分别是98年男单奥运冠军库里克和18年女单奥运亚军梅娃的3lz。两人技术差异很多，最主要的一点是梅娃起跳时整个身体转到前方，而库里克虽然肩膀转动幅度较大，胯部方向却很方正，没有转到前方。
Nick notes that male skaters more commonly use the blocked method, simply because they can jump higher and make up for the inefficiency of the lower body position at take-off with more air time. Many if not most female skaters (especially non-elite female skaters) performing triple lutz tend to take-off like Evgenia since they typically have lower air times and must pivot all the way to forward before lifting off the ice or they will not be able to complete the necessary rotations in the air.
Nick说：男选手较多使用方正式跳法，因为他们的跳跃高度和滞空时间可以弥补下肢姿势导致的转速不足。大多数女选手，特别是业余选手更多使用梅娃式跳法，因为她们滞空时间较短，只有在刀齿上多转才能完成周数。
Nick offers a tip to coaches: If a skater is strong, athletic, and jumps very high and naturally takes off with the hips-blocked technique, let them continue to use that technique. But if a skater cannot jump very high but takes off using the hips-blocked technique, it may make sense to switch to the pivot-forward technique in order to have success with the jump.
Nick给教练的建议是：如果选手力量强、身体素质好、跳跃高并自然采用了方正式起跳，让他们维持原状就好。但如果跳跃较低的选手采用了方正式跳法，可能需要换成转体向前的跳法才能成功。
At the end, Nick also points out that the rocker of the picking foot should not be placed on the ice. If the skater drops from the toe pick onto the skate blade, the jump actually becomes a loop.
结束时，Nick指出点冰足的刀刃弧度部分不应落在冰上。如果选手从刀齿落到刀刃上，就不是勾手跳而是后外结环跳了。
