A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women

Ray Lloyd, Karen Hind, Lisa K. Micklesfield, Sean Carroll, John G. Truscott, Bridget Parr, Simeon Davies, Carlton Cooke

Research output: Contribution to journalArticle

  • 8 Citations

Abstract

Although the influence of weight bearing activity on bone mass has been widely investigated in white women, few studies have been conducted in black, African populations. We investigated bone mineral density (BMD) in black South African women, with and without a history of load-carrying on the head. We also investigated whether load carrying may offer protection against low BMD in users of injectable progestin contraception (IPC). Participants were 32 black, South African women (22.4±3.2 yrs). Load carrying history was determined by questionnaire and interview and participants were grouped as load carriers (LC; n=18) or non load carriers (NLC; n=14). Ten women were using IPC and 6 were load-carriers. Total body (TB), lumbar spine (LS) and total hip (H) BMD were measured by dual energy X-ray absorptiometry. There were no differences in BMD between LC and NLC, and after controlling for age and BMI using two-tailed partial correlations. IPC users had lower BMD at all sites compared to non IPC users (p<0.05) and there were no associations between load carrying and BMD in this group. When IPC users were excluded from analysis, LC had higher LS BMD than NLC (p<0.005). Correlations were found between the weight of load carried and LS BMD (r=0.743, p<0.005), and between years of load carrying and LS and TB BMD (r=0.563, r=0.538 respectively; both p<0.05). Load carrying on the head may offer osteogenic benefits to the spine but these benefits did not appear in women using IPC.
Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalJournal of Bone and Mineral Metabolism
Volume28
Issue number2
DOIs
StatePublished - Mar 2010

Fingerprint

Bone Density
Progestins
Contraception
Spine
Photon Absorptiometry
Weight-Bearing
Hip
History
Interviews
Bone and Bones

Cite this

Lloyd, R., Hind, K., Micklesfield, L. K., Carroll, S., Truscott, J. G., Parr, B., ... Cooke, C. (2010). A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women. Journal of Bone and Mineral Metabolism, 28(2), 185-190. DOI: 10.1007/s00774-009-0113-3

Lloyd, Ray; Hind, Karen; Micklesfield, Lisa K.; Carroll, Sean; Truscott, John G.; Parr, Bridget; Davies, Simeon; Cooke, Carlton / A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women.

In: Journal of Bone and Mineral Metabolism, Vol. 28, No. 2, 03.2010, p. 185-190.

Research output: Contribution to journalArticle

@article{f36b91fb14844910a98074da5e13b479,
title = "A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women",
abstract = "Although the influence of weight bearing activity on bone mass has been widely investigated in white women, few studies have been conducted in black, African populations. We investigated bone mineral density (BMD) in black South African women, with and without a history of load-carrying on the head. We also investigated whether load carrying may offer protection against low BMD in users of injectable progestin contraception (IPC). Participants were 32 black, South African women (22.4±3.2 yrs). Load carrying history was determined by questionnaire and interview and participants were grouped as load carriers (LC; n=18) or non load carriers (NLC; n=14). Ten women were using IPC and 6 were load-carriers. Total body (TB), lumbar spine (LS) and total hip (H) BMD were measured by dual energy X-ray absorptiometry. There were no differences in BMD between LC and NLC, and after controlling for age and BMI using two-tailed partial correlations. IPC users had lower BMD at all sites compared to non IPC users (p<0.05) and there were no associations between load carrying and BMD in this group. When IPC users were excluded from analysis, LC had higher LS BMD than NLC (p<0.005). Correlations were found between the weight of load carried and LS BMD (r=0.743, p<0.005), and between years of load carrying and LS and TB BMD (r=0.563, r=0.538 respectively; both p<0.05). Load carrying on the head may offer osteogenic benefits to the spine but these benefits did not appear in women using IPC.",
author = "Ray Lloyd and Karen Hind and Micklesfield, {Lisa K.} and Sean Carroll and Truscott, {John G.} and Bridget Parr and Simeon Davies and Carlton Cooke",
year = "2010",
month = "3",
doi = "10.1007/s00774-009-0113-3",
volume = "28",
pages = "185--190",
journal = "Journal of Bone and Mineral Metabolism",
issn = "0914-8779",
publisher = "Springer Japan",
number = "2",

}

Lloyd, R, Hind, K, Micklesfield, LK, Carroll, S, Truscott, JG, Parr, B, Davies, S & Cooke, C 2010, 'A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women' Journal of Bone and Mineral Metabolism, vol 28, no. 2, pp. 185-190. DOI: 10.1007/s00774-009-0113-3

A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women. / Lloyd, Ray; Hind, Karen; Micklesfield, Lisa K.; Carroll, Sean; Truscott, John G.; Parr, Bridget; Davies, Simeon; Cooke, Carlton.

In: Journal of Bone and Mineral Metabolism, Vol. 28, No. 2, 03.2010, p. 185-190.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women

AU - Lloyd,Ray

AU - Hind,Karen

AU - Micklesfield,Lisa K.

AU - Carroll,Sean

AU - Truscott,John G.

AU - Parr,Bridget

AU - Davies,Simeon

AU - Cooke,Carlton

PY - 2010/3

Y1 - 2010/3

N2 - Although the influence of weight bearing activity on bone mass has been widely investigated in white women, few studies have been conducted in black, African populations. We investigated bone mineral density (BMD) in black South African women, with and without a history of load-carrying on the head. We also investigated whether load carrying may offer protection against low BMD in users of injectable progestin contraception (IPC). Participants were 32 black, South African women (22.4±3.2 yrs). Load carrying history was determined by questionnaire and interview and participants were grouped as load carriers (LC; n=18) or non load carriers (NLC; n=14). Ten women were using IPC and 6 were load-carriers. Total body (TB), lumbar spine (LS) and total hip (H) BMD were measured by dual energy X-ray absorptiometry. There were no differences in BMD between LC and NLC, and after controlling for age and BMI using two-tailed partial correlations. IPC users had lower BMD at all sites compared to non IPC users (p<0.05) and there were no associations between load carrying and BMD in this group. When IPC users were excluded from analysis, LC had higher LS BMD than NLC (p<0.005). Correlations were found between the weight of load carried and LS BMD (r=0.743, p<0.005), and between years of load carrying and LS and TB BMD (r=0.563, r=0.538 respectively; both p<0.05). Load carrying on the head may offer osteogenic benefits to the spine but these benefits did not appear in women using IPC.

AB - Although the influence of weight bearing activity on bone mass has been widely investigated in white women, few studies have been conducted in black, African populations. We investigated bone mineral density (BMD) in black South African women, with and without a history of load-carrying on the head. We also investigated whether load carrying may offer protection against low BMD in users of injectable progestin contraception (IPC). Participants were 32 black, South African women (22.4±3.2 yrs). Load carrying history was determined by questionnaire and interview and participants were grouped as load carriers (LC; n=18) or non load carriers (NLC; n=14). Ten women were using IPC and 6 were load-carriers. Total body (TB), lumbar spine (LS) and total hip (H) BMD were measured by dual energy X-ray absorptiometry. There were no differences in BMD between LC and NLC, and after controlling for age and BMI using two-tailed partial correlations. IPC users had lower BMD at all sites compared to non IPC users (p<0.05) and there were no associations between load carrying and BMD in this group. When IPC users were excluded from analysis, LC had higher LS BMD than NLC (p<0.005). Correlations were found between the weight of load carried and LS BMD (r=0.743, p<0.005), and between years of load carrying and LS and TB BMD (r=0.563, r=0.538 respectively; both p<0.05). Load carrying on the head may offer osteogenic benefits to the spine but these benefits did not appear in women using IPC.

U2 - 10.1007/s00774-009-0113-3

DO - 10.1007/s00774-009-0113-3

M3 - Article

VL - 28

SP - 185

EP - 190

JO - Journal of Bone and Mineral Metabolism

T2 - Journal of Bone and Mineral Metabolism

JF - Journal of Bone and Mineral Metabolism

SN - 0914-8779

IS - 2

ER -

Lloyd R, Hind K, Micklesfield LK, Carroll S, Truscott JG, Parr B et al. A pilot investigation of load-carrying on the head and bone mineral density in premenopausal, black African women. Journal of Bone and Mineral Metabolism. 2010 Mar;28(2):185-190. Available from, DOI: 10.1007/s00774-009-0113-3