Physical activity and dietary calcium interactions in bone mass in Scottish postmenopausal women

Alexandra Mavroeidi, Arthur D Stewart, David M Reid, Helen M Macdonald

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this population-based cohort of 1,254 older Scottish women we found significant interactions between the mechanical component of self-reported habitual physical activity (PA) and dietary calcium (Ca) in BMD, independent of other risk factors. At low and/or medium Ca intakes BMD was higher amongst the most active people. INTRODUCTION: Although there is general agreement that increased activity (PA) and dietary calcium (Ca) consumption may help maintain bone mass in later life and prevent fractures, the amount required remains uncertain. METHODS: In 2001-2003, 1,847 postmenopausal women (mean +/- SD age: 69.3 +/- 5.5 years) underwent bone mineral density (BMD) measurement and, in 2004, 68.7% (n = 1,254) completed a bone-specific Physical Activity Questionnaire (bsPAQ) and a food frequency questionnaire. The bsPAQ measures the metabolic and mechanical components of PA. Interactions of PA and Ca in BMD were examined using ANCOVA. RESULTS: Significant interactions were identified in the BMD of the lumbar spine (LS), right hip (RH) and left hip (LH), after adjustment for confounders, between tertiles of PA classified according to the mechanical component and tertiles of energy-adjusted Ca intake (ANCOVA p = 0.006, p = 0.004 and p = 0.013 respectively). For example, at medium Ca intakes LH BMD was higher by 7.8% in the highest tertile of PA compared with the lowest tertile of PA. CONCLUSIONS: These data suggest that health promotion campaigns to increase PA would be most effective in populations with a low/medium calcium intake.
Original languageEnglish
Pages (from-to)409-416
Number of pages8
JournalOsteoporosis International
Volume20
Issue number3
DOIs
Publication statusPublished - Mar 2009

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Dietary Calcium
Exercise
Bone and Bones
Bone Density
Calcium
Health Promotion
Hip
Pelvic Bones
Population
Spine

Keywords

  • absorptiometry, photon
  • aged
  • bone density
  • calcium, dietary
  • cohort studies
  • diet surveys
  • female
  • hip joint
  • humans
  • Lumbar Vertebrae
  • middle aged
  • Motor Activity
  • postmenopause
  • questionnaires
  • risk factors
  • Scotland
  • bone mineral density
  • bone specific physical activity questionnaire
  • dietary calcium intake
  • interactions
  • postmenopausal women

Cite this

Physical activity and dietary calcium interactions in bone mass in Scottish postmenopausal women. / Mavroeidi, Alexandra; Stewart, Arthur D; Reid, David M; Macdonald, Helen M.

In: Osteoporosis International, Vol. 20, No. 3, 03.2009, p. 409-416.

Research output: Contribution to journalArticle

Mavroeidi, Alexandra ; Stewart, Arthur D ; Reid, David M ; Macdonald, Helen M. / Physical activity and dietary calcium interactions in bone mass in Scottish postmenopausal women. In: Osteoporosis International. 2009 ; Vol. 20, No. 3. pp. 409-416.
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abstract = "In this population-based cohort of 1,254 older Scottish women we found significant interactions between the mechanical component of self-reported habitual physical activity (PA) and dietary calcium (Ca) in BMD, independent of other risk factors. At low and/or medium Ca intakes BMD was higher amongst the most active people. INTRODUCTION: Although there is general agreement that increased activity (PA) and dietary calcium (Ca) consumption may help maintain bone mass in later life and prevent fractures, the amount required remains uncertain. METHODS: In 2001-2003, 1,847 postmenopausal women (mean +/- SD age: 69.3 +/- 5.5 years) underwent bone mineral density (BMD) measurement and, in 2004, 68.7{\%} (n = 1,254) completed a bone-specific Physical Activity Questionnaire (bsPAQ) and a food frequency questionnaire. The bsPAQ measures the metabolic and mechanical components of PA. Interactions of PA and Ca in BMD were examined using ANCOVA. RESULTS: Significant interactions were identified in the BMD of the lumbar spine (LS), right hip (RH) and left hip (LH), after adjustment for confounders, between tertiles of PA classified according to the mechanical component and tertiles of energy-adjusted Ca intake (ANCOVA p = 0.006, p = 0.004 and p = 0.013 respectively). For example, at medium Ca intakes LH BMD was higher by 7.8{\%} in the highest tertile of PA compared with the lowest tertile of PA. CONCLUSIONS: These data suggest that health promotion campaigns to increase PA would be most effective in populations with a low/medium calcium intake.",
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AU - Mavroeidi, Alexandra

AU - Stewart, Arthur D

AU - Reid, David M

AU - Macdonald, Helen M

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N2 - In this population-based cohort of 1,254 older Scottish women we found significant interactions between the mechanical component of self-reported habitual physical activity (PA) and dietary calcium (Ca) in BMD, independent of other risk factors. At low and/or medium Ca intakes BMD was higher amongst the most active people. INTRODUCTION: Although there is general agreement that increased activity (PA) and dietary calcium (Ca) consumption may help maintain bone mass in later life and prevent fractures, the amount required remains uncertain. METHODS: In 2001-2003, 1,847 postmenopausal women (mean +/- SD age: 69.3 +/- 5.5 years) underwent bone mineral density (BMD) measurement and, in 2004, 68.7% (n = 1,254) completed a bone-specific Physical Activity Questionnaire (bsPAQ) and a food frequency questionnaire. The bsPAQ measures the metabolic and mechanical components of PA. Interactions of PA and Ca in BMD were examined using ANCOVA. RESULTS: Significant interactions were identified in the BMD of the lumbar spine (LS), right hip (RH) and left hip (LH), after adjustment for confounders, between tertiles of PA classified according to the mechanical component and tertiles of energy-adjusted Ca intake (ANCOVA p = 0.006, p = 0.004 and p = 0.013 respectively). For example, at medium Ca intakes LH BMD was higher by 7.8% in the highest tertile of PA compared with the lowest tertile of PA. CONCLUSIONS: These data suggest that health promotion campaigns to increase PA would be most effective in populations with a low/medium calcium intake.

AB - In this population-based cohort of 1,254 older Scottish women we found significant interactions between the mechanical component of self-reported habitual physical activity (PA) and dietary calcium (Ca) in BMD, independent of other risk factors. At low and/or medium Ca intakes BMD was higher amongst the most active people. INTRODUCTION: Although there is general agreement that increased activity (PA) and dietary calcium (Ca) consumption may help maintain bone mass in later life and prevent fractures, the amount required remains uncertain. METHODS: In 2001-2003, 1,847 postmenopausal women (mean +/- SD age: 69.3 +/- 5.5 years) underwent bone mineral density (BMD) measurement and, in 2004, 68.7% (n = 1,254) completed a bone-specific Physical Activity Questionnaire (bsPAQ) and a food frequency questionnaire. The bsPAQ measures the metabolic and mechanical components of PA. Interactions of PA and Ca in BMD were examined using ANCOVA. RESULTS: Significant interactions were identified in the BMD of the lumbar spine (LS), right hip (RH) and left hip (LH), after adjustment for confounders, between tertiles of PA classified according to the mechanical component and tertiles of energy-adjusted Ca intake (ANCOVA p = 0.006, p = 0.004 and p = 0.013 respectively). For example, at medium Ca intakes LH BMD was higher by 7.8% in the highest tertile of PA compared with the lowest tertile of PA. CONCLUSIONS: These data suggest that health promotion campaigns to increase PA would be most effective in populations with a low/medium calcium intake.

KW - absorptiometry, photon

KW - aged

KW - bone density

KW - calcium, dietary

KW - cohort studies

KW - diet surveys

KW - female

KW - hip joint

KW - humans

KW - Lumbar Vertebrae

KW - middle aged

KW - Motor Activity

KW - postmenopause

KW - questionnaires

KW - risk factors

KW - Scotland

KW - bone mineral density

KW - bone specific physical activity questionnaire

KW - dietary calcium intake

KW - interactions

KW - postmenopausal women

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DO - 10.1007/s00198-008-0681-4

M3 - Article

VL - 20

SP - 409

EP - 416

JO - Osteoporosis International

JF - Osteoporosis International

SN - 0937-941X

IS - 3

ER -