Field estimation of cardiorespiratory fitness in young females, eight to eleven years of age
Bibliographic record
Abstract
The purpose of this study was twofold: 1. To determine the validity of the 9 minute and 12 minute timed runs and the 1600 metre distance run as predictors of peak oxygen uptake and therefore as measures of cardiorespiratory fitness in girls 8 to 11 years of age. 2. To determine the reliability of the 9 minute and 12 minute timed runs and the 1600 metre distance run as measures of cardiorespiratory endurance. Hypotheses were formulated from these two major purposes as well as from additonal problems which included: (i) studying the relationship between the timed/distance runs and peak oxygen uptake as the distance and time components of the runs increased, (ii) determining the intercorrelatons between two different timed or distance runs with respect to the distance and the length of time spent running. Sixty female subjects from Crofton House School and St. Patrick's Elementary School, Vancouver, B.C., were tested on the three timed/distance runs, the 9 minute, 12 minute and,1600 metre runs and a peak oxygen uptake treadmill test. Anthropometric measures (height, weight and percent body fat) were also taken. Prior to the timed/distance run testing all of the subjects were taught the concept of paced running and had four practise runs to practise this concept. Twenty of the subjects completed all the testing. The validities of the 9 minute, the 12 minute and the 1600 metre runs as predictors of peak oxygen uptake and the interrelationships between all the variables were determined by developing a correlation matrix. Stepwise multiple regression analyses were conducted to select the independent variables (age, height, weight, percent body fat, 9 minute timed run, 12 minute timed run and the 1600 metre distance run) that best predicted the dependent variable, peak oxygen uptake. The reliabilities of the 9 minute, the 12 minute and the 1600 metre runs were determined by developing test-retest reliability correlation coefficients. The results indicated that all three timed/distance runs were significantly correlated with peak oxygen uptake. The 9 minute timed run exhibited the highest correlation with peak oxygen uptake followed by the 1600 metre distance run and the 12 minute timed run. Both the 1600 metre distance run and the 12 minute timed run showed significant test-retest reliability correlations, therefore were reliable predictors of peak oxygen uptake in girls 8 to 11 years-of age. The intercorrelations between the timed and distance runs showed the 9 minute timed run and the 1600 metre distance run having the highest degree of relationship followed by the 1600 metre distance run and the 12 minute timed run and finally the 9 minute and 12 minute timed runs. In conclusion both the 1600 metre distance run and the 12 minute timed run were considered to be reliable field tests and predicted peak oxygen uptake in girls 8 to 11 years of age. The 1600 metre distance run exhibited higher validity and reliability correlations and therefore would be the preferred field test of cardiorespiratory fitness in girls 8 to 11 years of age.
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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 | 0.001 | 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 | 0.001 |
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".