BENEFITS 益处
Increases abdominal strength; improves thoracic and rib cage forward flexion mobility; promotes deep abdominal function; improves breathing pattern; establishes connection between head and trunk movement.
增加腹肌力量；改善胸椎与肋骨向前屈曲的活动度；促进深层腹肌功能；改善呼吸模式；建立头部与躯干动作的连接。
TARGET MUSCLES 目标肌群
Rectus abdominis (primary curl), transversus abdominis and internal obliques (core stability, control rib depression), hip flexors (caution to avoid over-recruitment), deep cervical flexors (head stability).
腹直肌（主导卷起）、腹横肌与腹内斜肌（稳定核心，控制肋骨下压）、髋屈肌群（需注意避免过度募集）、颈深屈肌群（稳定头部）。
SETUP 设置
None
无
CUES 口令
Starting position: Supine on mat, knees bent, feet flat. Hands interlaced behind head. Pelvis neutral or slight lumbar flexion. Breathing/Movement: Inhale, lengthen crown up, neck away from shoulders. Exhale, engage abdominals, sternum sinks, curl head and upper thoracic off mat, keeping head weight in hands. Inhale, extend arms toward legs (straight). Exhale, using arms (or just holding), curl a little higher, abdominals sink more. Inhale, simultaneously extend arms back and up toward ceiling, then return behind head, maintaining height. Exhale, abdominals continue sinking, slowly roll back down. Imagery: Sternum like a submarine periscope, rising segmentally; abdominals like deep water, always sinking toward spine.
起始位：仰卧在垫上，膝盖弯曲，双脚脚掌踩地。双手手指交握置于头后方。骨盆处于中立位或根据情况采用轻微腰椎屈曲位。 呼吸与动作：吸气，头顶向上延伸，使颈部离开肩膀。吐气，启动腹肌，胸骨向下沉，将头部和上胸椎向前卷起离开垫子，保持头后侧重量持续沉在手中。吸气，将手向腿的方向延伸（手臂伸直）。吐气，用手臂协助（或仅保持位置），将上半身再卷高一点，腹部再向下沉。吸气，同时将双手向后上方（天花板方向）延伸，然后放回头后，过程中保持身体高度。吐气，腹部继续下沉，同时将身体慢慢卷回垫上。 想象提示：想象胸骨像潜水艇的瞭望镜，一节一节向前向上浮出水面；腹部像深水区，始终向下沉向脊柱。
IMAGERY 意象
Direct: Feel abdominals contract and back of neck lengthen. Indirect: Like a leaf gently curling from water, then smoothing out. Space: Imagine space between sternum and pubis shortening during curl. Feeling: Focus on abdominals sinking toward spine and head stable in hands.
直接：感受腹肌的收缩和颈部后侧的延伸。间接：像一片树叶从水面被轻柔卷起，又缓缓平复。空间：想象胸骨与耻骨之间的空间在卷起时缩短。感觉：注意力放在腹部向脊柱下沉，以及头后侧稳定于手中的感觉上。
TACTILE CUES 触觉提示
1. Gently support back of head with one hand, lightly touch lower abdomen with other, cue oppositional sensation of head sinking into hands and abdominals sinking. 2. During arm extension back, lightly touch lower ribs, cue to stay down. 3. During curl, lightly touch thoracic spinous processes to guide articulation.
1. 一手轻托练习者后脑勺，一手轻触其下腹部，引导“头沉手、腹下沉”的对向感觉。2. 在手臂向后上方延伸时，轻触其两侧肋骨下缘，提示保持下压贴地。3. 在卷起时，用手指轻触其胸椎棘突，引导逐节卷动。
PROGRESSION 进阶
1. Increase number of arm arcs. 2. Maintain neutral lumbar/pelvis throughout. 3. Perform with legs in tabletop to increase core challenge.
1. 增加手臂画弧动作的次数。2. 保持腰椎与骨盆在中立位完成整个动作。3. 在桌面腿（Tabletop）姿势下进行，增加核心挑战。
REGRESSION 退阶
1. Elevate upper body on wedge to reduce curl range. 2. Perform only arm phase (exhale) without increasing curl height. 3. Use slight lumbar flexion to reduce hip flexor dependence. 4. Perform only partial range.
1. 用楔形枕将上半身垫高，减少起始位所需的卷起幅度。2. 只进行手臂动作阶段（吐气时），保持身体高度不增加卷起。3. 采用腰椎微微屈曲位，减少对髋屈肌的依赖。4. 只完成一部分动作幅度。
COMMON ERRORS 常见错误
Changing pelvic position (excessive posterior/anterior tilt); lifting too high causing ribs to flare; over-recruiting hip flexors (lumbar arching); breath holding or excessive breath; head/chin jutting forward.
改变骨盆位置（如过度后倾或前倾）；身体起得太高，导致肋骨上翻；髋屈肌群过度募集（腰部拱起代偿）；过度吸气或吐气，憋气；头或下巴向前突出。
PRECAUTIONS 注意事项
Caution or avoid for osteoporosis, late pregnancy. For neck pain, support head with hands and prioritize improving thoracic mobility.
骨质疏松症、怀孕后期慎做或避免。颈椎疼痛者务必用手托住头，并优先改善胸椎活动度。