跳步传球（Crow Hop）
Also known as: 跳步footwork, 蓄力跳步
跳步传球是野手接到球后使用的一个小跳步动作——后脚重新落地并朝目标方向小步移动——用以在长传或身体失去平衡的情况下积蓄动能、调整身体方向。
接到滚地球或高飞球之后，野手的身体很少能恰好正面朝向目标、稳稳站定。跳步动作通过后脚的一次快速小跳，同时将髋部和肩膀重新调整朝向目标，并产生传导进传球中的向前动能，原理类似于助跑起步能为投球增加力量。这一动作在外野手完成长传向垒包或本垒板时最为常见，但内野手在需要额外送球距离的传球中，也会使用规模更小的同样蓄力对齐动作。
跳步的价值有两方面：它把接球过程中产生的横向或后退动能转化为朝目标方向的前向动能，同时也给野手一个瞬间去找准握球方式、对齐前肩，再出手。在长传中，仓促或省略跳步动作，通常表现为送球距离和准度的下降，因为手臂被迫独自产生全部力量，得不到下肢和动能的辅助。
Example
中外野手在跑动中接到球，跳步一次调整身体，随即在移动中把球精准传给切球员。
Why it matters
干净利落的跳步动作，往往决定着一次传球是平直地飞向目标，还是飘偏或掉速——这是下肢的技术问题，而不是臂力问题，因此可以直接通过录像来指导纠正。
How it shows up on video
On video, a good crow hop shows a quick replant of the back foot with the hips and front shoulder rotating toward the target during the hop, immediately followed by a direct crow step into the throw. A rushed or skipped crow hop shows the fielder throwing flat-footed or from an open, unaligned base.
Common mistakes
- Skipping the crow hop entirely under time pressure, forcing the arm to generate all the throw's power without help from the lower half
- Crow-hopping directly sideways or backward instead of toward the target, which wastes the momentum the hop is meant to create
- Taking too many extra hops or shuffle steps, adding unnecessary time to a throw that needs to be quick
In SwingVantage Motion Lab
SwingVantage Motion Lab tracks the timing and direction of the back-foot replant relative to the target line. This shows whether the crow hop is actually adding usable momentum or simply adding time without carry.
Frequently asked questions
内野手的跳步动作和外野手一样吗？
内野手使用的是同一种蓄力对齐动作的更小、更快版本，因为他们的传球距离更短，速度比外野手长传所需的动能更重要。
Related terms
Related guides & benchmarks
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