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A 9-week longitudinal study evaluated the influence of slow-paced breathing and power posing on pre-competitive anxiety in an amateur American football team. Thirty-four amateur athletes aged 16–18 years participated, with the Competitive State Anxiety Inventory-2 Revised (CSAI-2R) administered before and after each game. The dataset was published by Erick Yael Fernández-Barradas on figshare in May 2026.
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