{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T06:28:47Z","timestamp":1759991327765},"reference-count":29,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2006,10,4]],"date-time":"2006-10-04T00:00:00Z","timestamp":1159920000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American J Hematol"],"published-print":{"date-parts":[[2007,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>There is limited information regarding the optimal hemoglobin level for physical activity and most studies followed relatively few participants. The object of this study was to assess iron storage levels in a population of healthy young males and their impact on physical fitness. Blood samples were drawn from 358 consenting infantry recruits for hemoglobin, iron, ferritin, transferrin, folic acid, and B<jats:sub>12<\/jats:sub> levels. A detailed medical and nutritional history was noted. Recruits performed a field fitness test including a 2,000\u2010m run. Mean hemoglobin was 13.8 \u00b1 1.0 g\/dl. Level of hemoglobin lower than 14 and 12 g\/dl were found in 53.6% and 4.5% of the recruits, respectively. Mean ferritin was 57 \u00b1 34 ng\/ml, with 15% of the recruits under 25 ng\/ml. On multivariate analysis, after adjusting for pre\u2010induction sports activity (<jats:italic>P<\/jats:italic> &lt; 0.001), intermediate pre\u2010induction hemoglobin level (12\u201314 g\/dl) was associated with significantly faster 2,000\u2010m running time (530 \u00b1 69 s, <jats:italic>n<\/jats:italic> = 176) than both the lower hemoglobin group (570 \u00b1 77 s, <jats:italic>n<\/jats:italic> = 16) and the higher hemoglobin group (552 \u00b1 86 s, <jats:italic>n<\/jats:italic> = 166, <jats:italic>P<\/jats:italic> &lt; 0.05). The subjects in this study were non\u2010athletic healthy young men. The high rate of abnormally low hemoglobin and ferritin values probably indicates a nutritional deficit in this population. The slower running results in the group with hemoglobin below 12 g\/dl are in line with previous work, indicating the need for iron supplementation. The decrease in running ability with increased hemoglobin above 14 g\/dl is surprising and will need further evaluation. Am. J. Hematol., 2006. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/ajh.20791","type":"journal-article","created":{"date-parts":[[2006,10,4]],"date-time":"2006-10-04T17:58:15Z","timestamp":1159984695000},"page":"128-133","source":"Crossref","is-referenced-by-count":19,"title":["The prevalence of low hemoglobin values among new infantry recruits and nonlinear relationship between hemoglobin concentration and physical fitness"],"prefix":"10.1002","volume":"82","author":[{"given":"Victor","family":"Novack","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aharon S.","family":"Finestone","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naama","family":"Constantini","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ofer","family":"Shpilberg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shimon","family":"Weitzman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Drorit","family":"Merkel","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,10,4]]},"reference":[{"key":"e_1_2_1_2_2","first-page":"xv","volume-title":"The Washington Manual of Medical Therapeutics","author":"Green GB","year":"2004"},{"key":"e_1_2_1_3_2","volume-title":"Harrison's Principles of Internal Medicine","author":"Harrison TR","year":"2000"},{"key":"e_1_2_1_4_2","first-page":"xxix","volume-title":"Harrison's Principles of Internal Medicine","author":"Kasper D","year":"2005"},{"key":"e_1_2_1_5_2","first-page":"359","article-title":"Better dead than second","volume":"120","author":"Eicher ER","year":"1992","journal-title":"J Lab Clin Med"},{"issue":"9","key":"e_1_2_1_6_2","first-page":"S315","article-title":"Sports anemia, iron supplements, and blood doping","volume":"24","author":"Eichner ER","year":"1992","journal-title":"Med Sci Sports Exerc"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-200333030-00003"},{"key":"e_1_2_1_8_2","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1016\/S0278-5919(20)30533-0","article-title":"Sports anemia","volume":"11","author":"Balaban EP","year":"1992","journal-title":"Clin Sports Med"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1249\/00005768-198912000-00003"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-2008-1026073"},{"key":"e_1_2_1_11_2","first-page":"147","article-title":"The etiology of \u201csports anemia.\u201d A physiological adaptation of the oxygen\u2010dissociation curve of hemoglobin to an unphysiological exercise load","volume":"216","author":"Hallberg L","year":"1984","journal-title":"Acta Med Scand"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.0954-6820.1984.tb03787.x"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.0954-6820.1984.tb03786.x"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.7326\/0003-4819-100-6-843"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jadohealth.2004.08.029"},{"key":"e_1_2_1_16_2","doi-asserted-by":"crossref","first-page":"326","DOI":"10.1093\/milmed\/154.6.326","article-title":"The Army Physical Fitness Test (APFT): A review of the literature","volume":"154","author":"Knapik J","year":"1989","journal-title":"Mil Med"},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-199826040-00001"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-200029010-00003"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1097\/00005768-200002000-00012"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF00634973"},{"key":"e_1_2_1_21_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-1021278"},{"key":"e_1_2_1_22_2","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-199927040-00003"},{"key":"e_1_2_1_23_2","first-page":"691","article-title":"Ueber eine neue form von haemoglobinurie beim menschen","volume":"18","author":"Fleischer R","year":"1881","journal-title":"Berl Klin Wochenschr"},{"key":"e_1_2_1_24_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-972881"},{"key":"e_1_2_1_25_2","unstructured":"Israel health report. 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