Authors: M Tveit B E Rosengren JÅ Nilsson H G Ahlborg M K Karlsson
Publish Date: 2012/07/18
Volume: 24, Issue: 4, Pages: 1389-1397
Abstract
This is a study on exerciseassociated bone mineral density BMD which in men is maintained three decades after cessation of sports In this prospective controlled cohort study active athletes had a BMD Zscore of 10 and after 39 years 05 to 12 depending on the measured region using the same singlephoton absorptiometry device dual Xray absorptiometry DXA and peripheral computed tomography pQCTBone mineral density grams per square centimeter was measured in 46 male athletes with a mean age of 22 years range 15–40 by using the same singlephoton absorptiometry device both at active career and a mean of 39 years range 38–40 later when they had longterm retired At followup BMD was also evaluated by DXA and pQCT Twentyfour nonathletic males of similar age served as controls Betweengroup differences are presented as means with 95 confidence intervalsThe active athletes baseline had a BMD Zscore of 10 07 14 in the femoral condyles The retired athletes followup had a BMD Zscore of 05 to 12 depending on the measuring technique and the measured region The tibial cortical area Zscore at followup was 08 05 12 and the tibial strength index Zscore 07 04 10 There were no changes in BMD Zscores from activity to retirement neither when estimated by the same device in different regions ∆ Zscore −03 −08 02 nor in the same region with different devices ∆ Zscore 00 −04 04 The benefits remained after adjustments for anthropometrics and lifestyle No correlation was seen with years since retirement
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