Student or educator? Sign up with your school email and get 6 months of Pro free.
CoChat
Sign Up
Cited by 124

The DOI matches its Crossref record.

Eight Months of Regular In-School Jumping Improves Indices of Bone Strength in Adolescent Boys and Girls: The POWER PE Study

Weeks, Benjamin K, Young, Cath M, Beck, Belinda R·2008·Journal of Bone and Mineral Research
DOI 10.1359/jbmr.080226
Open this paper in CoChat — free account

Abstract

The POWER PE study was an 8-mo, randomized, controlled, school-based exercise intervention designed to apply known principles of effective bone loading to practical opportunities to improve life-long musculoskeletal outcomes. A total of 99 adolescents (46 boys and 53 girls) with a mean age of 13.8 ± 0.4 yr (peri- to postpubertal) volunteered to participate. Intervention subjects performed 10 min of jumping activity in place of regular physical education (PE) warm up. Control subjects performed usual PE warm-up activities. Bone mass (DXA and QUS) was assessed at baseline and follow-up along with anthropometry, maturity, muscle power, and estimates of physical activity and dietary calcium. Geometric properties (such as femoral neck [FN] moment of inertia) were calculated from DXA measures. Boys in the intervention group experienced improvements in calcaneal broadband ultrasound attenuation (BUA) (+5.0%) and fat mass (−10.5%), whereas controls did not (+1.4% and –0.8%, respectively). Girls in the intervention group improved FN BMC (+13.9%) and lumbar spine (LS) BMAD (+5.2%) more than controls (+4.9% and +1.5%, respectively). Between-group comparisons of change showed intervention effects only for whole body (WB) BMC (+10.6% versus +6.3%) for boys. Boys in the intervention group gained more lean tissue mass, trochanter (TR) BMC, LS BMC, and WB BMC and lost more fat mass than girls in the intervention group (p < 0.05). Ten minutes of jumping activity twice a week for 8 mo during adolescence seems to improve bone accrual in a sex-specific manner. Boys increased WB bone mass and BUA, and reduced fat mass, whereas girls improved bone mass at the hip and spine.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1359/jbmr.080226

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

No references could be resolved yet.

Research works printed but not linked: 31

  1. Cassell, 1996, Bone mineral density in elite 7- to 9-yr-old female gymnasts and swimmers, Med Sci Sports Exerc, 28, 1243, 10.1097/00005768-199610000-00006 · DOI
  2. Kannus, 1995, Effect of starting age of physical activity on bone mass in the dominant arm of tennis and squash players, Ann Intern Med, 123, 27, 10.7326/0003-4819-123-1-199507010-00003 · DOI · Paper page
  3. Fuchs, 2001, Jumping improves hip and lumbar spine bone mass in prepubescent children: A randomized controlled trial, J Bone Miner Res, 16, 148, 10.1359/jbmr.2001.16.1.148 · DOI · Paper page
  4. MacKelvie, 2002, Bone mineral response to a 7-month randomized controlled, school-based jumping intervention in 121 prepubertal boys: Associations with ethnicity and body mass index, J Bone Miner Res, 17, 834, 10.1359/jbmr.2002.17.5.834 · DOI
  5. Blimkie, 1996, Effects of resistance training on bone mineral content and density in adolescent females, Can J Physiol Pharmacol, 74, 1025, 10.1139/y96-099 · DOI
  6. Heinonen, 2000, High-impact exercise and bones of growing girls: A 9-month controlled trial, Osteoporos Int, 11, 1010, 10.1007/s001980070021 · DOI · Paper page
  7. Kontulainen, 2002, Does previous participation in high-impact training result in residual bone gain in growing girls? One year follow-up of a 9-month jumping intervention, Int J Sports Med, 23, 575, 10.1055/s-2002-35543 · DOI
  8. Fuchs, 2002, Gains in hip bone mass from high-impact training are maintained: A randomized controlled trial in children, J Pediatr, 141, 357, 10.1067/mpd.2002.127275 · DOI
  9. Weeks, 2007, The ability of different methods of physical activity measurement to predict indices of bone strength, Med Sci Sports Exerc, 39, S64, 10.1249/01.mss.0000273154.24426.40 · DOI
  10. McKay, 2005, “Bounce at the Bell”: A novel program of short bouts of exercise improves proximal femur bone mass in early pubertal children, Br J Sports Med, 39, 521, 10.1136/bjsm.2004.014266 · DOI
  11. Bradney, 1998, Moderate exercise during growth in prepubertal boys: Changes in bone mass, size, volumetric density, and bone strength: A controlled prospective study, J Bone Miner Res, 13, 1814, 10.1359/jbmr.1998.13.12.1814 · DOI · Paper page
  12. Mirwald, 2002, An assessment of maturity from anthropometric measurements, Med Sci Sports Exerc, 34, 689
  13. Bailey, 1999, A six-year longitudinal study of the relationship of physical activity to bone mineral accrual in growing children: The university of Saskatchewan bone mineral accrual study, J Bone Miner Res, 14, 1672, 10.1359/jbmr.1999.14.10.1672 · DOI · Paper page
  14. Sievanen, 1996, Estimation of various mechanical characteristics of human bones using dual energy x-ray absorptiometry: Methodology and precision, Bone, 18, 17S, 10.1016/8756-3282(95)00376-2 · DOI
  15. Baxter-Jones, 2005, Controlling for maturation in pediatric exercise science, Pediatr Exerc Sci, 17, 18, 10.1123/pes.17.1.18 · DOI
  16. Witzke, 2000, Effects of plyometric jump training on bone mass in adolescent girls, Med Sci Sports Exerc, 32, 1051, 10.1097/00005768-200006000-00003 · DOI · Paper page
  17. Wang, 2005, Influence of physical activity and maturation status on bone mass and geometry in early pubertal girls, Scand J Med Sci Sports, 15, 100, 10.1111/j.1600-0838.2004.00402.x · DOI
  18. MacKelvie, 2002, Is there a critical period for bone response to weight-bearing exercise in children and adolescents? A systematic review, Br J Sports Med, 36, 250, 10.1136/bjsm.36.4.250 · DOI · Paper page
  19. Petit, 2002, A randomized school-based jumping intervention confers site and maturity-specific benefits on bone structural properties in girls: A hip structural analysis, J Bone Miner Res, 17, 363, 10.1359/jbmr.2002.17.3.363 · DOI · Paper page
  20. Johannsen, 2003, Bone response to jumping is site-specific in children: A randomized trial, Bone, 33, 533, 10.1016/S8756-3282(03)00220-5 · DOI
  21. Arnett, 2002, Effects of rope-jump training on the os calcis stiffness index of postpubescent girls, Med Sci Sports Exerc, 34, 1913, 10.1097/00005768-200212000-00009 · DOI
  22. Morris, 1997, Prospective ten-month exercise intervention in premenarcheal girls: Positive effects on bone and lean mass, J Bone Miner Res, 12, 1453, 10.1359/jbmr.1997.12.9.1453 · DOI · Paper page
  23. Wideman, 2002, Growth hormone release during acute and chronic aerobic and resistance exercise: Recent findings, Sports Med, 32, 987, 10.2165/00007256-200232150-00003 · DOI
  24. Sakata, 2003, Skeletal unloading induces resistance to insulin-like growth factor I on bone formation, Bone, 32, 669, 10.1016/S8756-3282(03)00088-7 · DOI
  25. Courteix, 1998, Effect of physical training on bone mineral density in prepubertal girls: A comparative study between impact-loading and non-impact-loading sports, Osteoporos Int, 8, 152, 10.1007/BF02672512 · DOI · Paper page
  26. Courteix, 2005, Cumulative effects of calcium supplementation and physical activity on bone accretion in premenarchal children: A double-blind randomised placebo-controlled trial, Int J Sports Med, 26, 332, 10.1055/s-2004-821040 · DOI
  27. Wang, 2007, Weight-bearing, muscle loading and bone mineral accrual in pubertal girls—A 2-year longitudinal study, Bone, 40, 1196, 10.1016/j.bone.2006.12.054 · DOI
  28. Anderson, 2000, The important role of physical activity in skeletal development: How exercise may counter low calcium intake, Am J Clin Nutr, 71, 1384, 10.1093/ajcn/71.6.1384 · DOI
  29. Inman, 1999, Mechanical loading attenuates bone loss due to immobilization and calcium deficiency, J Appl Physiol, 87, 189, 10.1152/jappl.1999.87.1.189 · DOI
  30. NHMRC, 2006, Nutrient Reference Values for Australia and New Zealand
  31. Haiat, 2007, Variation of ultrasonic parameters with microstructure and material properties of trabecular bone: A 3D model simulation, J Bone Miner Res, 22, 665, 10.1359/jbmr.070209 · DOI

Cited by

See all 124

Metadata

Authors
Weeks, B. K., Young, C. M., & Beck, B. R.
Venue
Journal of Bone and Mineral Research
Publisher
Oxford University Press (OUP)
Published
2008-07-01
Volume
23
Issue
7
Pages
1002-1011
ISSN
  • 0884-0431
  • 1523-4681
DOI
10.1359/jbmr.080226
Cited by
124
References
0
Language
en
Licence
academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model (vor)

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Eight Months of Regular In-School Jumping Improves Indices of Bone Strength in Adolescent Boys and Girls: The POWER PE Study. https://app.cochat.ai/papers/10.1359/jbmr.080226
The paper
Weeks, B. K., Young, C. M., & Beck, B. R. (2008). Eight Months of Regular In-School Jumping Improves Indices of Bone Strength in Adolescent Boys and Girls: The POWER PE Study. Journal of Bone and Mineral Research. https://doi.org/10.1359/jbmr.080226

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.