Reliability of Measuring Hip and Knee Power and Movement Velocity in Active Youth
Bibliographic record
Abstract
PURPOSE: The purpose of this study was to determine the reliability of measuring neuromuscular power and movement velocity of the hip and knee in young, active individuals using an isokinetic dynamometer. METHODS: Peak power, average power, and peak velocity (PV) data were recorded for the hip in the standing position and the knee in the sitting position in 52 youth aged 10 to 14 years on 2 occasions approximately 1 week apart. RESULTS: The PV measures demonstrated the best absolute reliability of all variables tested (coefficients of variation of the typical error [CV(TE)] = 5.0%-8.5%; standard errors of measurement = 18.1-21.1°/s). Hip flexion and knee extension peak power and average power exhibited acceptable reliability (CV(TE) = 8.7%-10.8%) compared with the other isokinetic tests (CV(TE) = 16.9%-32.8%). CONCLUSIONS: Peak velocity appears to be a reliable means of indirectly measuring neuromuscular power in active youth, whereas direct measurement of power is only reliable for certain movements.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| 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) | 0.000 | 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 teacher head, 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".