{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T20:11:06Z","timestamp":1790971866489,"version":"4.1.0"},"reference-count":29,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[1995,1,1]],"date-time":"1995-01-01T00:00:00Z","timestamp":788918400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"name":"Research Service Department of Veterans Affairs"},{"DOI":"10.13039\/100008749","name":"American College of Sports Medicine","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100008749","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1995,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Female athletes exhibit a higher prevalence of exercise-associated amenorrhea and oligomenorrhea compared with nonathletic women, and both conditions are related to reduced bone mineral density (BMD), particularly at the spine. This study investigated bone mass and oligomenorrhea and amenorrhea in two groups of competitive female athletes with different skeletal loading patterns: gymnasts and runners. Bone mineral density (g\/cm2) of the femoral neck, lumbar spine (L2\u20134), and whole body was assessed by dual energy X-ray absorptiometry (QDR-1000\/W, Hologic Inc., Waltham, MA) in collegiate gymnasts (n = 21) and runners (n = 20), and nonathletic college women (n = 19). The runners and gymnasts had similar values for percent body fat (14.7 \u00b1 2.2% and 15.6 \u00b1 2.9%, respectively), which were lower (p &amp;lt; 0.001) than controls (223 \u00b1 3.0%). Lean body mass (LBM) did not differ among the groups, but when adjusted for body surface area, gymnasts had a higher LBM\/height2 (p = 0.0001) compared with runners and controls. Muscle strength was significantly greater (p &amp;lt; 0.05) in gymnasts for quadriceps, biceps, and hip adductor force, compared with runners and controls. Gymnasts had a significantly later menarche age (16.2 \u00b1 1.7 years) compared with runners (14.4 \u00b1 1.7 years) and controls (13.0 \u00b1 1.2 years). The prevalence of oligo- and amenorrhea was 47% for gymnasts (6 amenorrheic, 4 oligomenorrheic), 30% for runners (3 amenorrheic, 3 oligomenorrheic), and 0% for controls. Furthermore, athletic groups had similar menstrual histories given the higher proportion of gymnasts who had experienced primary amenorrhea. When evaluated since menarche, however, runners had somewhat longer histories due to an earlier age at menarche and slightly older ages. Dietary calcium intake did not differ among groups, although mean values were below the RDA of 1200 mg\/day. By athletic group, BMD at any site did not differ among women with amenorrhea versus oligomenorrhea versus eumenorrhea, although there was a trend for the regularly menstruating athletes in both groups to have slightly higher values. Lumbar spine BMD was lower (p = 0.0001) in runners (0.98 \u00b1 0.11 g\/cm2) compared with both gymnasts and controls (1.17 \u00b1 0.13 and 1.11 \u00b1 0.11 g\/cm2, respectively). Femoral neck BMD differed among all groups (p = 0.0001): gymnasts = 1.09 \u00b1 0.12 g\/cm2 &amp;gt; controls = 0.97 \u00b1 0.10 g\/cm2 &amp;gt; runners = 0.88 \u00b1 0.11 g\/cm2. Whole body BMD was lower (p &amp;lt; 0.01) in runners (1.04 \u00b1 0.06 g\/cm2) compared with gymnasts and controls (1.11 \u00b1 0.08 and 1.09 \u00b1 0.06 g\/cm2, respectively). When adjusted for estimated bone size, lumbar spine and femoral neck bone mineral apparent density (BMAD, g\/cm3) differed (p = 0.0001) among all groups: gymnasts &amp;gt; controls &amp;gt; runners. In conclusion: (1) gymnasts exhibited higher femoral neck BMD than runners and controls as well as a later age at menarche and a slightly higher (nonsignificant) prevalence of oligo-and amenorrhea; (2) runners exhibited lower BMD values compared with gymnasts despite similar current and historical menstrual cycle patterns; and (3) the mechanical forces generated from high impact loading and muscular contraction during gymnastics training have powerful osteogenic effects, which appear to counteract the increased bone resorption that has been shown to result from oligo- and amenorrhea.<\/jats:p>","DOI":"10.1002\/jbmr.5650100107","type":"journal-article","created":{"date-parts":[[2010,2,3]],"date-time":"2010-02-03T11:00:26Z","timestamp":1265194826000},"page":"26-35","source":"Crossref","is-referenced-by-count":242,"title":["Gymnasts exhibit higher bone mass than runners despite similar prevalence of amenorrhea and oligomenorrhea"],"prefix":"10.1093","volume":"10","author":[{"given":"T.L.","family":"Robinson","sequence":"first","affiliation":[{"name":"Bone Research Laboratory, Department of Exercise & Sport Science, Oregon State University, Corvallis, Oregon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Snow-Harter","sequence":"additional","affiliation":[{"name":"Bone Research Laboratory, Department of Exercise & Sport Science, Oregon State University, Corvallis, Oregon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D.R.","family":"Taaffe","sequence":"additional","affiliation":[{"name":"Musculoskeletal Research Laboratory. GRECC, Palo Alto VA Medical Center, Palo Alto, California, and Department of Medicine, Stanford University, Stanford, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D.","family":"Gillis","sequence":"additional","affiliation":[{"name":"Bone Research Laboratory, Department of Exercise & Sport Science, Oregon State University, Corvallis, Oregon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Shaw","sequence":"additional","affiliation":[{"name":"Bone Research Laboratory, Department of Exercise & Sport Science, Oregon State University, Corvallis, Oregon"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Marcus","sequence":"additional","affiliation":[{"name":"Musculoskeletal Research Laboratory. GRECC, Palo Alto VA Medical Center, Palo Alto, California, and Department of Medicine, Stanford University, Stanford, California"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[1995,1,1]]},"reference":[{"issue":"5","key":"2024013113134868200_bib1","doi-asserted-by":"crossref","first-page":"626","DOI":"10.1001\/jama.1984.03340290040017","article-title":"Decreased spinal mineral content in amenorrheic women","volume":"251","author":"Cann","year":"1984","journal-title":"JAMA"},{"issue":"4","key":"2024013113134868200_bib2","doi-asserted-by":"crossref","first-page":"545","DOI":"10.1001\/jama.1990.03440040084033","article-title":"Menstrual history as a determinant of current bone density in young athletes","volume":"263","author":"Drinkwater","year":"1990","journal-title":"JAMA"},{"issue":"5","key":"2024013113134868200_bib3","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1056\/NEJM198408023110501","article-title":"Bone mineral content of amenorrheic and eumenorrheic athletes","volume":"311","author":"Drinkwater","year":"1984","journal-title":"N Engl J Med"},{"key":"2024013113134868200_bib4","doi-asserted-by":"crossref","first-page":"158","DOI":"10.7326\/0003-4819-102-2-158","article-title":"Menstrual function and bone mass in elite women distance runners","volume":"102","author":"Marcus","year":"1985","journal-title":"Ann Intern Med"},{"key":"2024013113134868200_bib5","doi-asserted-by":"crossref","first-page":"691","DOI":"10.1016\/S0015-0282(16)45908-X","article-title":"Menstrual dysfunction and hormonal status in athletic women: A Review","volume":"36","author":"Baker","year":"1981","journal-title":"Fertil Steril"},{"issue":"3","key":"2024013113134868200_bib6","doi-asserted-by":"crossref","first-page":"275","DOI":"10.1249\/00005768-199006000-00001","article-title":"Effects of exercise training on the menstrual cycle: Existence and mechanisms","volume":"22","author":"Loucks","year":"1990","journal-title":"Med Sci Sports Exerc"},{"issue":"3","key":"2024013113134868200_bib7","first-page":"173","article-title":"Menstrual cycle changes with marathon training: Anovulation and short luteal phase","volume":"7","author":"Prior","year":"1982","journal-title":"Can J Appl Sport Sci"},{"key":"2024013113134868200_bib8","doi-asserted-by":"crossref","first-page":"859","DOI":"10.1016\/0002-9378(82)90463-X","article-title":"Is athletic amenorrhea specific to runners?","volume":"143","author":"Sanborn","year":"1982","journal-title":"Am J Obstet Gynacol"},{"key":"2024013113134868200_bib9","doi-asserted-by":"crossref","first-page":"1665","DOI":"10.1001\/jama.1990.03440120087043","article-title":"Evaluation and management of menstrual dysfunction in athletes","volume":"263","author":"Shangold","year":"1990","journal-title":"JAMA"},{"issue":"11","key":"2024013113134868200_bib10","doi-asserted-by":"crossref","first-page":"1197","DOI":"10.1249\/00005768-199311000-00001","article-title":"Low bone mineral density at axial and appendicular sites in amenorrheic athletes","volume":"25","author":"Myburgh","year":"1993","journal-title":"Med Sci Sports Exerc"},{"issue":"2","key":"2024013113134868200_bib11","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1002\/jbmr.5650060213","article-title":"Longitudinal precision of dual-energy x-ray absorptiometry in a multicenter study","volume":"6","author":"Orwoll","year":"1991","journal-title":"J Bone Miner Res"},{"issue":"2","key":"2024013113134868200_bib12","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1002\/jbmr.5650070204","article-title":"New approaches for interpreting projected bone densitometry data","volume":"7","author":"Carter","year":"1992","journal-title":"J Bone Miner Res"},{"key":"2024013113134868200_bib13","doi-asserted-by":"crossref","first-page":"1332","DOI":"10.1210\/jcem-73-6-1332","article-title":"Clinical and anthropometric correlates of bone mineral acquisition in healthy adolescent girls","volume":"73","author":"Katzman","year":"1991","journal-title":"J Clin Endocrinol Metabol"},{"key":"2024013113134868200_bib14","doi-asserted-by":"crossref","first-page":"910","DOI":"10.1093\/ajcn\/43.6.910","article-title":"Diet and bone status in amenorrheic runners","volume":"43","author":"Nelson","year":"1986","journal-title":"Am J Clin Nutr"},{"key":"2024013113134868200_bib15","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1007\/BF02553711","article-title":"Regulation of bone mass by mechanical strain magnitude. 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