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Bone mineral density in mature, premenopausal ultramarathon runners.
Med Sci Sports Exerc. 1995 May; 27(5):688-96.MS

Abstract

We measured bone mineral density (BMD) in 25 premenopausal ultramarathon (56 km) runners aged 29-39 yr and related risk factors for decreased BMD with actual BMD. Fifteen runners who had never had oligo/amenorrhea (R) were compared with 10 runners (OA): 4 oligomenorrheic, 2 amenorrheic, and 4 with prior oligo/amenorrhea. Menstrual, dietary and training data were obtained. BMD of the lumbar spine (LS) and proximal femur (F) were measured by dual energy x-ray densitometry. Both groups had similar body mass (58 +/- 8 vs 57 +/- 8 kg), running and dietary histories. F BMD was not different (P = 0.07) and correlated only with BMI (P < 0.05; r = 0.43). LS BMD was lower in OA (0.946 +/- 0.098 g.cm-2) than R (1.088 +/- 0.069 g.cm-2; P < 0.001). Menstrual History Index (MHI), (estimated periods.yr-1 since age 13), was higher in R (11.6 +/- 0.6) than OA (9.4 +/- 2.1; P < 0.01). LS BMD correlated with MHI (P < 0.0005; r = 0.67) and years oligomenorrheic (P < 0.01; r = -0.58) but not years amenorrheic, parity, breastfeeding, diet, or training. In conclusion, in mature women distance runners low LS BMD is related to a history of oligo/amenorrhea regardless of resumption of regular menstrual cycles in some subjects. Not only amenorrhea, but also prolonged oligomenorrhea may negatively influence peak adult bone mass.

Authors+Show Affiliations

MRC/UCT Bioenergetics of Exercise Research Unit, Department of Physiology, University of Cape Town Medical School, South Africa.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

7674873

Citation

Micklesfield, L K., et al. "Bone Mineral Density in Mature, Premenopausal Ultramarathon Runners." Medicine and Science in Sports and Exercise, vol. 27, no. 5, 1995, pp. 688-96.
Micklesfield LK, Lambert EV, Fataar AB, et al. Bone mineral density in mature, premenopausal ultramarathon runners. Med Sci Sports Exerc. 1995;27(5):688-96.
Micklesfield, L. K., Lambert, E. V., Fataar, A. B., Noakes, T. D., & Myburgh, K. H. (1995). Bone mineral density in mature, premenopausal ultramarathon runners. Medicine and Science in Sports and Exercise, 27(5), 688-96.
Micklesfield LK, et al. Bone Mineral Density in Mature, Premenopausal Ultramarathon Runners. Med Sci Sports Exerc. 1995;27(5):688-96. PubMed PMID: 7674873.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bone mineral density in mature, premenopausal ultramarathon runners. AU - Micklesfield,L K, AU - Lambert,E V, AU - Fataar,A B, AU - Noakes,T D, AU - Myburgh,K H, PY - 1995/5/1/pubmed PY - 1995/5/1/medline PY - 1995/5/1/entrez SP - 688 EP - 96 JF - Medicine and science in sports and exercise JO - Med Sci Sports Exerc VL - 27 IS - 5 N2 - We measured bone mineral density (BMD) in 25 premenopausal ultramarathon (56 km) runners aged 29-39 yr and related risk factors for decreased BMD with actual BMD. Fifteen runners who had never had oligo/amenorrhea (R) were compared with 10 runners (OA): 4 oligomenorrheic, 2 amenorrheic, and 4 with prior oligo/amenorrhea. Menstrual, dietary and training data were obtained. BMD of the lumbar spine (LS) and proximal femur (F) were measured by dual energy x-ray densitometry. Both groups had similar body mass (58 +/- 8 vs 57 +/- 8 kg), running and dietary histories. F BMD was not different (P = 0.07) and correlated only with BMI (P < 0.05; r = 0.43). LS BMD was lower in OA (0.946 +/- 0.098 g.cm-2) than R (1.088 +/- 0.069 g.cm-2; P < 0.001). Menstrual History Index (MHI), (estimated periods.yr-1 since age 13), was higher in R (11.6 +/- 0.6) than OA (9.4 +/- 2.1; P < 0.01). LS BMD correlated with MHI (P < 0.0005; r = 0.67) and years oligomenorrheic (P < 0.01; r = -0.58) but not years amenorrheic, parity, breastfeeding, diet, or training. In conclusion, in mature women distance runners low LS BMD is related to a history of oligo/amenorrhea regardless of resumption of regular menstrual cycles in some subjects. Not only amenorrhea, but also prolonged oligomenorrhea may negatively influence peak adult bone mass. SN - 0195-9131 UR - https://www.unboundmedicine.com/medline/citation/7674873/Bone_mineral_density_in_mature_premenopausal_ultramarathon_runners_ L2 - https://Insights.ovid.com/pubmed?pmid=7674873 DB - PRIME DP - Unbound Medicine ER -