PMID- 7362545 OWN - NLM STAT- MEDLINE DCOM- 19800514 LR - 20081121 IS - 0095-6562 (Print) IS - 0095-6562 (Linking) VI - 51 IP - 1 DP - 1980 Jan TI - Development of "sports anemia" in physically fit men after daily sustained submaximal exercise. PG - 41-5 AB - Hematological changes were studied in physically fit young soldiers who marched 35 km/d for 6 d, working at 35% of their Vo2 max. Four days of marching produced decreases in numbers of erythrocytes (RBC) and in hematocrit (Hct). This "sports anemia" persisted beyond day 6 into the post-march period and was accompanied by decreases in hemoglobin (Hb), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), and mean corpuscular volume (MCV). The latter decrease was attributed to a preferential destruction of large RBC. The post-march period was characterized by an early (2 d) recovery of RBC numbers, Hct, and MCV, and a persistent (greater than 4 d) decrease in Hb, MCH, and MCHC. This pattern, characteristic of hypochromic macrocystosis, possibly reflects a premature release of young RBC from the bone marrow. Clearly, "Sports anemia," previously reported to occur with intensive physical exercise, can also result from sustained and repetitive submaximal exercise. FAU - Radomski, M W AU - Radomski MW FAU - Sabiston, B H AU - Sabiston BH FAU - Isoard, P AU - Isoard P LA - eng PT - Journal Article PL - United States TA - Aviat Space Environ Med JT - Aviation, space, and environmental medicine JID - 7501714 RN - 0 (Blood Proteins) SB - IM MH - Adult MH - Anemia/*etiology MH - Blood Proteins/metabolism MH - Erythrocyte Count MH - Hematocrit MH - Hemoglobinometry MH - Humans MH - Male MH - Physical Endurance MH - *Physical Exertion MH - *Physical Fitness OID - NASA: 80153186 EDAT- 1980/01/01 00:00 MHDA- 1980/01/01 00:01 CRDT- 1980/01/01 00:00 PHST- 1980/01/01 00:00 [pubmed] PHST- 1980/01/01 00:01 [medline] PHST- 1980/01/01 00:00 [entrez] PST - ppublish SO - Aviat Space Environ Med. 1980 Jan;51(1):41-5.