Evidence map›Paper›PMID 25233222›Full record

ArticlePloS one2014

Effects of different types of jump impact on trabecular bone mass and microarchitecture in growing rats.

Yong-In Ju, Teruki Sone, Kazuhiro Ohnaru, Kensuke Tanaka, Hidetaka Yamaguchi, Masao Fukunaga

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 1 pooled it
2.8field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

  1. The National Osteoporosis Foundation's position statement on peak bone mass development and lifestyle factors: a systematic review and implementation recommendations.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2016
    Pooled it
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Jumping exercise preserves bone mineral density and mechanical properties in osteopenic ovariectomized rats even following established osteopenia.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2017
    Article
  10. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Yong-In JuDepartment of Health and Sports Sciences, Kawasaki University of Medical Welfare, Kurashiki, Okayama, Japan.
Teruki SoneDepartment of Nuclear Medicine, Kawasaki Medical School, Kurashiki, Okayama, Japan.
Kazuhiro OhnaruDepartment of Orthopedic Surgery, Kawasaki Medical School, Kurashiki, Okayama, Japan.
Kensuke TanakaDepartment of Nuclear Medicine, Kawasaki Medical School, Kurashiki, Okayama, Japan.
Hidetaka YamaguchiDepartment of Sports Social Management, Sports Health Course School of Social Science, KIBI International University, Takahashi, Okayama, Japan.
Masao FukunagaKawasaki Medical School, Kurashiki, Okayama, Japan.
Kawasaki Medical School · JPKawasaki University of Medical Welfare · JPKibi International University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Substantial evidence from animal studies indicates that jumping increases bone mass and strength. However, most studies have focused on the take-off, rather than the landing phase of jumps. Thus, we compared the effects of landing and upward jump impact on trabecular bone mass and microarchitecture. Male Wistar rats aged 10 weeks were randomly assigned to the following groups: sedentary control (CON), 40-cm upward jumps (40UJ); 40-cm drop jumps (40DJ); and 60-cm drop jumps (60DJ) (n = 10 each). The upward jump protocol comprised 10 upward jumps/day, 5 days/week for 8 weeks to a height of 40 cm. The drop jump protocol comprised dropping rats from a height of 40 or 60 cm at the same frequency and time period as the 40UJ group. Trabecular bone mass, architecture, and mineralization at the distal femoral metaphysis were evaluated using microcomputed tomography. Ground reaction force (GRF) was measured using a force platform. Bone mass was significantly higher in the 40UJ group compared with the DJ groups (+49.1% and +28.3%, respectively), although peak GRF (-57.8% and -122.7%, respectively) and unit time force (-21.6% and -36.2%, respectively) were significantly lower in the 40UJ group. These results showed that trabecular bone mass in growing rats is increased more effectively by the take-off than by the landing phases of jumps and suggest that mechanical stress accompanied by muscle contraction would be more important than GRF as an osteogenic stimulus. However, the relevance of these findings to human bone physiology is unclear and requires further study.

Indexed as

AnimalsBiomechanical PhenomenaBone DensityCalcification, PhysiologicFemurMaleMotor ActivityMuscle, SkeletalOrgan SizeRats, WistarX-Ray Microtomography

Identifiers

PMID25233222
PMCPMC4169454
OpenAlexW1977554116

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.