Caro Betancur, Harryson EmmanuelRomero Morales, CarlosZayas Castaño, JoelMiñambres Martín, DiegoLópez López, DanielVillafañe, Jorge HugoGarcía Mateos, Mónica2026-01-232026-01-232025Caro-Betancur, H. E., Romero-Morales, C., Zayas-Castaño, J., Miñambres-Martín, D., López-López, D., Villafañe, J. H., & García-Mateos, M. (2025). Sex-specific muscle size in climbers: A novel cross-sectional study of an ultrasonographic analysis of abdominal wall muscles. Life, 15(8), 1275. https://doi.org/10.3390/life150812752075-1729https://hdl.handle.net/11268/16760This study aimed to evaluate and compare the thickness of the external oblique (EO), internal oblique (IO), transversus abdominis (TrAb), rectus abdominis (RA), and the inter-recti distance (IRD) between male and female climbers, using B-mode ultrasonography to identify potential sex-based morphological differences. This study highlights sex-related differences in abdominal muscle thickness among trained climbers. While male participants generally showed greater muscle thickness, the left EO was thicker in females. These morphological differences may reflect sex-specific anatomical adaptations, but further research is needed to determine their functional relevance. Current and future findings may contribute to the development of sex-specific training, rehabilitation, and injury prevention strategies in climbing.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article10.3390/life15081275open accessCiencias médicasDeporteTecnología médicaGoal 3: Ensure healthy lives and promote well-being for all at all agesGoal 5: Achieve gender equality and empower all women and girls