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A sample of 2059 Norwegian women completed a survey reporting: weekly training volume; current HC usage, type, and reasons for use; cycle\u2010related symptom frequency and severity; and the prevalence of menstrual disorders\/disturbances. Respondents were categorized by age (youth: 13\u201320; young adults: 21\u201330; older adults: 31\u201350\u2009years) and training category (minimal: 0; low: &lt;\u20095; moderate: 5\u20139; high: \u2265\u20099\u2009h\n                    <jats:bold>\u00b7<\/jats:bold>\n                    week\n                    <jats:sup>\u22121<\/jats:sup>\n                    ). Half (51.6%) of respondents reported current HC usage, predominantly long\u2010acting reversible contraception or combined oral contraceptives. Young adults had the highest prevalence of HC use (62.7%) compared to youth (48.4%) and older adults (43.8%), although no differences in usage were seen across training categories. HC users reported fewer and less severe cycle\u2010related symptoms compared to non\u2010users. A third (30.8%) of non\u2010HC users had experienced a menstrual disorder\/disturbance, with no significant differences observed across training categories or age groups. In conclusion, HC use is widespread among Norwegian women, with no differences between training categories. This similar HC prevalence suggests that HC research conducted in female cohorts may be generalizable, independent of training category. However, attention should be paid to participants' age due to differences in HC use between age groups.\n                  <\/jats:p>","DOI":"10.1111\/sms.70096","type":"journal-article","created":{"date-parts":[[2025,7,12]],"date-time":"2025-07-12T07:20:16Z","timestamp":1752304816000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Prevalence of Hormonal Contraceptive Use and Self\u2010Reported Symptomatic Experiences Attributed to the Menstrual Cycle or Hormonal Contraceptive Use in Norwegian Women: The Effect of Training Categories and Age Groups \u2010 The FENDURA Project"],"prefix":"10.1111","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8681-8521","authenticated-orcid":false,"given":"John Owen","family":"Osborne","sequence":"first","affiliation":[{"name":"School of Sport Sciences UiT the Arctic University of Norway  Troms\u00f8 Norway"},{"name":"Sunshine Coast Hospital and Health Service  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