Longitudinal effects of childhood recreational gymnastics participation on bone development: The Young Recreational Gymnast Study
Bibliographic record
Abstract
Purpose: Previous research in the Young Recreational Gymnast Study (2006-2014) found bone benefits from involvement in recreational gymnastics during young childhood. The purpose of this study was to identify any longitudinal effects of recreational gymnastics exposure during childhood on adolescent bone health. Methods: For the present analysis, longitudinal data were available from 118 participants (66 female participants; 33 gymnasts) of the original 178 who were recruited and assessed on between one and five measurement occasions (median 3) between 2008 and 2020. Peripheral quantitative computed tomography (pQCT) scans were completed at both the distal and shaft sites of their non-dominant radius and tibia. Multilevel random-effects models were constructed to assess differences in the development of bone content, density, and estimated bone strength between those exposed and not exposed to recreational gymnastics while controlling for biological age, sex, body weight, limb length, and physical activity. Results: Individuals who were exposed to recreational gymnastics during childhood were found to have greater total area, total content, bone strength index, trabecular area, trabecular content, and trabecular density at the distal radius compared to physically active controls. There were no differences at the radial shaft, distal tibia, or tibial shaft. Conclusion: Involvement in childhood recreational gymnastics may provide long-term benefits at the distal radius as individuals enter young adulthood.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".