The effect of levonorgestrel-releasing intrauterine device in sport performance among young athletes from Brazilian Paralympic Athletics Team.

The effect of levonorgestrel-releasing intrauterine device in sport performance among young athletes from Brazilian Paralympic Athletics Team. | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article The effect of levonorgestrel-releasing intrauterine device in sport performance among young athletes from Brazilian Paralympic Athletics Team. MAITA POLI DE ARAUJO, Daniella De Batista Depes, Thiago Lourenço, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5851554/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Introduction : The use of highly effective contraceptives could be a health measure for Paralympic athletes and may potentially have a positive impact on sports performance. Objectives : To describe the effect of the levonorgestrel-releasing intrauterine device (IUD-LNG) on sports performance indicators in Paralympic athletes. Methods : A prospective, non-randomized, descriptive study was conducted with 10 Paralympic athletes, aged between 18 and 25 years, who chose the levonorgestrel-releasing intrauterine device (Kyleena®, Bayer HealthCare Pharmaceutical Inc., Wayne, NJ, USA) as a contraceptive method. Pain scores during insertion were assessed using the Visual Analog Scale (VAS). The main performance indicators studied were: motor variables (isokinetic test, 50-meter sprint, and vertical jump), somatic variables (body composition and bone mineral density), and health variables (menstrual bleeding pattern, blood levels of hemoglobin, iron, and ferritin). Motor and health variables were measured before insertion and every four months. Menstrual bleeding patterns were classified as favorable or unfavorable. Body composition values before device insertion were compared with values after one year of use. The sample was non-probabilistic, for convenience. Data were described as means and standard deviations. Comparisons between periods regarding measured variables were performed using the Friedman or Wilcoxon test. Results : The average pain score during insertion was 3.2±0.5, and the occurrence of pain was associated with a history of dysmenorrhea (p=0.04) and difficulty during device insertion (p=0.05). There was no difference between pain scores and disability types (p=0.7). Hemoglobin, iron, and ferritin concentrations increased over the course of Kyleena use, with a statistically significant difference for hemoglobin (p=0.02). After one year of use, lean mass increased from 40.9±5.5 kg to 41.8±6.6 kg (p=0.04). Bone mineral density increased from 1.25±0.1 to 1.26±0.2 (p=0.46). Isokinetic evaluation showed an increase in peak torque during dominant limb flexion (p=0.3), and a decrease in peak torque during extension (p=0.7). For total work, the increase occurred in the fourth month of Kyleena IUD use, both for flexion (p=0.3) and extension (p=0.3). There was an increase in vertical jump performance at the fourth and eighth months of Kyleena IUD use (p=0.9), but a decline after one year of use (p=0.3). Regarding the sprint test, there was improvement in time at each four-month interval, and after one year of use, the time decreased from 7.44 seconds to 7.22 seconds (p=0.6). Menstrual bleeding patterns were classified as favorable, and all athletes were highly satisfied with the method. Conclusion : The Kyleena IUD had a positive effect on the sports performance parameters of Paralympic athletes. After one year of use, the menstrual bleeding pattern was considered favorable, and the athletes were highly satisfied with the method. Sports Medicine and Kinesiology Hormonal Contraception Athletic Performances Para-Athletes IUD Hormone Releasing Full Text Additional Declarations The authors declare no competing interests. Ethics Approval Statement The study titled "The effect of levonorgestrel-releasing intrauterine device in sport performance among young athletes from Brazilian Paralympic Team" has been approved by the Ethics Committee of the University of Campinas (UNICAMP), under approval number CAAE: 62860122.6.0000.5404. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5851554","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":403698845,"identity":"888da0e5-a49b-43e1-bbe7-61c481745062","order_by":0,"name":"MAITA POLI DE 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4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003e\u003cstrong\u003eIntroduction\u003c/strong\u003e: The use of highly effective contraceptives could be a health measure for Paralympic athletes and may potentially have a positive impact on sports performance.\u0026nbsp;\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eObjectives\u003c/strong\u003e: To describe the effect of the levonorgestrel-releasing intrauterine device (IUD-LNG) on sports performance indicators in Paralympic athletes.\u0026nbsp;\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eMethods\u003c/strong\u003e: A prospective, non-randomized, descriptive study was conducted with 10 Paralympic athletes, aged between 18 and 25 years, who chose the levonorgestrel-releasing intrauterine device (Kyleena®, Bayer HealthCare Pharmaceutical Inc., Wayne, NJ, USA) as a contraceptive method. Pain scores during insertion were assessed using the Visual Analog Scale (VAS). The main performance indicators studied were: motor variables (isokinetic test, 50-meter sprint, and vertical jump), somatic variables (body composition and bone mineral density), and health variables (menstrual bleeding pattern, blood levels of hemoglobin, iron, and ferritin). Motor and health variables were measured before insertion and every four months. Menstrual bleeding patterns were classified as favorable or unfavorable. Body composition values before device insertion were compared with values after one year of use. The sample was non-probabilistic, for convenience. Data were described as means and standard deviations. Comparisons between periods regarding measured variables were performed using the Friedman or Wilcoxon test.\u0026nbsp;\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eResults\u003c/strong\u003e: The average pain score during insertion was 3.2±0.5, and the occurrence of pain was associated with a history of dysmenorrhea (p=0.04) and difficulty during device insertion (p=0.05). There was no difference between pain scores and disability types (p=0.7). Hemoglobin, iron, and ferritin concentrations increased over the course of Kyleena use, with a statistically significant difference for hemoglobin (p=0.02). After one year of use, lean mass increased from 40.9±5.5 kg to 41.8±6.6 kg (p=0.04). Bone mineral density increased from 1.25±0.1 to 1.26±0.2 (p=0.46). Isokinetic evaluation showed an increase in peak torque during dominant limb flexion (p=0.3), and a decrease in peak torque during extension (p=0.7). 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