EFFECT OF PHYSICAL ACTIVITY ON AGE OF PEAK HEIGHT VELOCITY AND AGE OF MENARCHE
Bibliographic record
Abstract
The effect of physical activity, during the growing years, on biological maturity is of considerable interest in pediatric exercise science. In this study, we compared the age of peak height velocity (PHV), age of menarche (AM), and the variation between PHV and AM among 3 categories of physical activity (PA) groups. Data were from the Saskatchewan Bone Mineral Accrual (Longitudinal) Study. Subjects' height were measured semi-annually from 1991–96. Longitudinal data covering the complete adolescent growth period were obtained in 79 girls. PHV was determined from whole-year velocity values, and a cubic spline fit was applied to the whole-year velocities for each subject. AM and PA were determined prospectively (via questionnaire) given at each measurement occasion. Subjects were classified into 3 PA categories based on their cumulative physical activity scores over the 7 years of the study. Results of a oneway ANOVA showed no differences in the dependent variables among the PA groups; thus physical activity during the growing years did not affect the onset of maturity indicators in this sample of girls.Table
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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 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".