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IBA significantly improved forced expiratory volume in 1\u2009s by 0.19\u2009L (95% CI 0.14\u20130.23) and forced expiratory flow between 25% and 75% by 0.40\u2009L\/s (95% CI 0.24\u20130.56), with lung function improvements confirmed at WADA\u2010permitted doses. Heart rate significantly increased by 1.40\u2009bpm (95% CI 0.32\u20132.48). IBA did not influence aerobic performance. When administered within WADA 2025 permitted doses, IBA can provide small but relevant gains in anaerobic performance in healthy individuals, while simultaneously offering therapeutic bronchodilation for athletes with asthma or exercise\u2010induced bronchoconstriction. Dose restrictions are critical to minimize the risk of performance enhancement that exceeds therapeutic intent and to mitigate adverse effects. 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