Document Detail

Assessment of the bone quality of black female athletes using quantitative ultrasound.
MedLine Citation:
PMID:  18997655     Owner:  NLM     Status:  MEDLINE    
AIM: The mean daily calcium intake of adult Nigerians is reportedly low, and animal studies have shown that exercise-induced changes in the bones of growing mice are gender specific. We therefore sought to describe calcaneal broadband ultrasound attenuation (BUA), speed of sound (SOS), stiffness index (SI) and SI-based T-scores in a cohort of Nigerian female athletes; to assess the correlation of SI with energy expenditure; and to compare mean SI values between sports. METHODS: We recruited 52 female athletes in 10 sporting categories, and recorded their anthropometric data. Activity levels were estimated using a questionnaire. Bone density was assessed using calcaneal ultrasound. RESULTS: The mean age of athletes was 21+/-4 years (range 15-39 years). The mean body mass index (BMI) was 22.0+/-3.5 kg/m2, and was not different between the sub-group of footballers/runners (21.3+/-1.7 kg/m2) and other athletes (23.1+/-4.8 kg/m2, P=0.06). The mean energy expenditure was 32.2+/-9.5 kcal/kg/ day, and was not different between the sub-group of footballers/runners (30.8+/-9.2 kcal/kg/day) and other athletes (34.3+/-9.7 kcal/kg/day, P=0.19). The mean BUA of the athletes was 135+/-14 dB/MHz, the mean SOS was 1597+/-13 m/s, the mean SI was 118+/-15, and the median SI-based T-score was +1.1 (-1.6 to +3.53). The means of all ultrasound parameters were not significantly different between footballers/runners and other sportswomen. CONCLUSION: Consistent physical training may improve calcaneal SI of black females by one, and potentially by as much as three T-score units. Training intensity, rather than the qualitative aspects of a sport, appears to be a major determinant of SI in female Nigerian athletes.
E P Laabes; D J Vanderjagt; M O Obadofin; A J Sendeht; R H Glew
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  48     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2008-11-10     Completed Date:  2009-03-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  502-8     Citation Subset:  IM    
Department of Family Medicine, Jos University Teaching Hospital, Jos, Nigeria.
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MeSH Terms
African Continental Ancestry Group*
Body Mass Index
Bone Density / physiology*
Calcaneus / physiology,  ultrasonography*
Energy Metabolism / physiology
Follow-Up Studies
Retrospective Studies
Sports / physiology*
Young Adult

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