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Archives of Osteoporosis

, 13:20 | Cite as

Higher step count is associated with greater bone mass and strength in women but not in men

  • Sanna TolonenEmail author
  • Harri Sievänen
  • Mirja Hirvensalo
  • Marika Laaksonen
  • Vera Mikkilä
  • Kristiina Pälve
  • Terho Lehtimäki
  • Olli Raitakari
  • Mika Kähönen
Original Article
  • 132 Downloads

Abstract

Summary

In this cross-sectional study, peripheral bone traits were examined relative to total daily steps measured with pedometer. Higher number of steps was associated with greater bone values at the calcaneus and tibia in women, but not in men. In women, dose-dependent associations at the radius were congruent with the weight-bearing bones.

Introduction

Habitual physical activity measured as daily steps may contribute to bone density and strength at the calcaneus and other weight-bearing bones.

Methods

Subgroups of 705–837 women and 480–615 men aged 31–46 years from the Cardiovascular Risk in Young Finns Study participated in the present study. Participants were instructed to use pedometer for 1 week, and the total daily steps, divided into tertiles, were evaluated relative to quantitative ultrasound-measured bone traits at the calcaneus and peripheral quantitative computed tomography-measured bone traits at the tibia and radius. Analysis of covariance was used to examine the between-group differences.

Results

In women, significant dose-dependent between-group differences were found in the weight-bearing bones and in non-weight-bearing radius. The differences in broadband ultrasound attenuation and speed of sound at the calcaneus were 3.8 and 0.5% greater in women within the highest tertile of daily steps compared to the lowest tertile (p values for trend ≤ 0.04). In tibia, women in the highest tertile (> 8765 steps/day) had on average 1–5.4% greater bone cross-sectional area, bone mineral content (BMC), trabecular density, and bone strength index at the distal site and 1.6–2.7% greater bone areas, BMC and strength strain index (SSI) at the shaft compared to women with less daily steps (p values for trend ≤ 0.02). Similarly, in radius, BMC and BSI at the distal site, and bone cross-sectional areas, BMC and SSI at the shaft were 1.7–3.4% greater in women within the highest tertile of daily steps compared to their peers (p values for trend ≤ 0.04). In men, the differences in calcaneal, tibial, and radial bone traits were mainly non-significant between the tertiles of daily steps.

Conclusion

Observed significant positive associations between daily steps and various bone traits at the calcaneus, tibia, and radius in women suggest that habitual physical activity may benefit skeletal health in adulthood.

Keywords

Peripheral quantitative computed tomography (pQCT) Quantitative ultrasound (QUS) Pedometer Step counts Physical activity 

Notes

Funding information

The Young Finns Study has been financially supported by the Academy of Finland: grants 286284, 134309 (Eye), 126925, 121584, 124282, 129378 (Salve), 117787 (Gendi) (ST), and 41071 (Skidi); the Social Insurance Institution of Finland; Competitive State Research Financing of the Expert Responsibility area of Kuopio, Tampere and Turku University Hospitals (grant X51001); Juho Vainio Foundation (ST); Paavo Nurmi Foundation; Finnish Foundation for Cardiovascular Research; Finnish Cultural Foundation (ST); Tampere Tuberculosis Foundation; Emil Aaltonen Foundation; Yrjö Jahnsson Foundation; Signe and Ane Gyllenberg Foundation, and Diabetes Research Foundation of Finnish Diabetes Association.

Compliance with ethical standards

Conflicts of interest

None.

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Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2018

Authors and Affiliations

  • Sanna Tolonen
    • 1
    • 2
    • 3
    Email author
  • Harri Sievänen
    • 4
  • Mirja Hirvensalo
    • 5
  • Marika Laaksonen
    • 1
  • Vera Mikkilä
    • 1
    • 6
  • Kristiina Pälve
    • 6
  • Terho Lehtimäki
    • 2
  • Olli Raitakari
    • 7
  • Mika Kähönen
    • 3
  1. 1.Department of Food and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
  2. 2.Department of Clinical Chemistry, Fimlab Laboratories and Faculty of Medicine and Life SciencesUniversity of TampereTampereFinland
  3. 3.Department of Clinical Physiology, Tampere University Hospital and Faculty of Medicine and Life SciencesUniversity of TampereTampereFinland
  4. 4.The UKK Institute for Health Promotion ResearchTampereFinland
  5. 5.Faculty of Sport and Health SciencesUniversity of JyväskyläJyväskyläFinland
  6. 6.Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku and Heart CenterTurku University HospitalTurkuFinland
  7. 7.Research Centre of Applied and Preventive Cardiovascular Medicine, University of Turku and Department of Clinical Physiology and Nuclear MedicineTurku University HospitalTurkuFinland

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