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Metric semantic description
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This metric measures the short-term variability in the alignment between the head and trunk, indicating how consistently the upper body maintains its axial posture. In épée fencing, this reflects the postural organization that underpins balance, visual tracking, distance assessment, and precise weapon handling. Lower variability signifies stronger postural coherence, which is essential for maintaining stability and control during dynamic movements.

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Phenomenon
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The athlete demonstrates low variability in head-to-trunk alignment, indicating a stable axial posture with consistent coordination between head position and trunk organization. This steadiness reflects reliable visual-motor coupling, allowing the athlete to maintain a coherent upper-body axis without compensatory movements during fencing actions.

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Causes
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This stable axial alignment arises from a steady head carriage combined with coordinated trunk control. The athlete’s reliable visual-motor coupling ensures that head and trunk movements remain synchronized, minimizing unnecessary adjustments and maintaining postural consistency throughout movement.

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Effects
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Such stability enhances the athlete’s ability to read distance accurately, maintain balance, and exert consistent control over the weapon even under pressure. This postural coherence supports smoother execution and clearer timing by reducing disruptions in upper-body alignment during fencing exchanges.