ArticleEuropean journal of sport science2026
Upper-Body Neuromechanical Coordination Strategies During Fatiguing Sustained Dead Hangs in Climbers.
Article in European journal of sport science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This study investigated how upper-body joint and muscle coordination strategies are related and adapted under fatigue during sustained dead hangs, a task relevant to climbing performance. Eleven climbers performed a dead hang until failure. Joint coordination variability (rCV) was assessed using a modified vector coding method in kinematic data. Muscle coordination was analyzed through EMG linear and non-linear dependencies between signals with coherence (β/γCOH) and mutual information (β/γMI) at beta and gamma bands. Fatigue induced joint-specific changes in coordination variability, with wrist rCV decreasing from START to END (39.6 ± 32.9% vs. 21.2 ± 12.4%; p = 0.002), showing a redistribution of coordination demands across the upper limb. At the muscle level, βCOH increased in selected postural muscle pairs, including brachioradialis-biceps (p = 0.04), trapezius-biceps (p = 0.04), and trapezius-brachioradialis (p = 0.003), while γCOH decreased for trapezius-brachioradialis (p = 0.01). In addition, βMI increased for brachioradialis (p = 0.01) and brachioradialis-biceps (p = 0.01), while γMI increased within the finger flexors (p = 0.03). Repeated-measures correlation revealed inverse within-subject associations between wrist rCV and trapezius-brachioradialis γCOH (r
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