University of Wolverhampton
Browse
Collection All
bullet
bullet
bullet
bullet
Listed communities
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet
bullet

Wolverhampton Intellectual Repository and E-Theses > School of Sport, Performing Arts and Leisure > Research Centre for Sport, Exercise and Performance > Exercise and Health > Physiological factors associated with low bone mineral density in female endurance runners

Please use this identifier to cite or link to this item: http://hdl.handle.net/2436/14994
    Del.icio.us     LinkedIn     Citeulike     Connotea     Facebook     Stumble it!



Title: Physiological factors associated with low bone mineral density in female endurance runners
Authors: Burrows, Mark
Nevill, Alan M.
Bird, Steve
Simpson, David
Citation: British Journal of Sports Medicine, 37: 67–71
Publisher: BMJ Publishing
Issue Date: 2003
URI: http://hdl.handle.net/2436/14994
DOI: 10.1136/bjsm.37.1.67
Additional Links: http://bjsm.bmj.com/cgi/content/abstract/37/1/67
Abstract: Objective: To explore potential factors that could be associated with low bone mineral density (BMD) in female endurance runners. Methods: Fifty two female endurance runners (1500 m to marathon), aged 18–44 years, took part. Body fat percentage, lumbar spine BMD, and femoral neck BMD were measured using the Hologic QDR 4500w bone densitometer. Data on training, menstrual cycle status, osteoporosis, and health related factors were obtained by questionnaire. Dietary variables were assessed from a prospective seven day dietary record of macronutrients and micronutrients. Results: The mean (SD) lumbar spine and femoral neck BMD were 1.11 (0.11) and 0.89 (0.12) g/cm2 respectively. A backward elimination regression analysis showed that age, body mass, body fat, distance run, magnesium, and zinc intake were the variables significantly associated with BMD. Lumbar spine BMD (g/cm2) = -1.90 + (0.0486 ´ age (years)) + (0.342 ´ log mass (kg)) - (0.000861 ´ age2 (years)) - (0.00128 ´ distance (km/week)), with an R2 = 30.1% (SEE = 0.089 (95% confidence interval (CI) 0.05 to 0.23); p<0.001). Femoral neck BMD (g/cm2) = -2.51 - (0.00989 ´ age (years)) + (0.720 ´ log mass (kg)) + (0.000951 ´ magnesium (mg/day)) -(0.0289 ´ zinc (mg/day)) - (0.00821 ´ body fat (%)) - (0.00226 ´ distance (km/week)), with an R2 = 50.2% (SEE = 0.100 (95% CI 0.06 to 0.22); p<0.001). The negative association between skeletal BMD and distance run suggested that participants who ran longer distances had a lower BMD of the lumbar spine and femoral neck. Further, the results indicated a positive association between body mass and BMD, and a negative association between body fat and BMD. Conclusions: The results suggest a negative association between endurance running distance and lumbar spine and femoral neck BMD, with a positive association between body mass and femoral neck and lumbar spine BMD. However, longitudinal studies are required to assess directly the effect of endurance running and body mass on BMD, and to see if the addition of alternative exercise that would increase lean body mass would have a positive effect on BMD and therefore help to prevent osteoporosis.
Language: n/a
Keywords: Bone mineral density
Endurance runners
Female
ISSN: 03063674
Appears in Collections: Sport, Exercise and Health Research Group
Exercise and Health
Learning and Teaching in Sport, Exercise and Performance

Files in This Item:
File Description Size Format View/Open
Nevill bjsm 2003.pdf314KbAdobe PDFThumbnail
View/Open

All Items in WIRE are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Fairtrade - Guarantees a better deal for Third World Producers

University of Wolverhampton, Wulfruna Street, Wolverhampton, WV1 1LY

Course enquiries: 0800 953 3222, General enquiries: 01902 321000,
Email: enquiries@wlv.ac.uk | Freedom of Information | Disclaimer and copyright | Website feedback | The University as a charity

OR Logo Powered by Open Repository | Cookies