COMPARISON OF A MODIFIED STEP TEST AND A 1-MILE RUN FOR PREDICTING AEROBIC FITNESS IN YOUTH
Notice bibliographique
Résumé
The purpose of this study was to evaluate the feasibility and accuracy of a shortened step test in assessing children's cardiovascular fitness. The Canadian Aerobic Fitness Test (CAFT) has been commended for its simplicity and its ability to rule out motivation as a confounding variable, but it is not efficient for testing large groups. A revised stepping protocol was developed by changing the step height, tempo, and testing apparatus (from a two-step box to a staircase). The intent of this study was to evaluate the effectiveness of this modified step test to predict peak oxygen consumption as compared to the predictive validity of a one-mile run/walk. Subjects consisted of 28 children (18 boys and 10 girls) ranging in age from 10 to 14. Within a one-week period, each subject completed three measures of cardiovascular fitness-a treadmill test, the revised step test, and one-mile run/walk; the test order was counter balanced. Peak O2 from the treadmill test served as the criterion for the multiple regression equations. Anthropometric measures were obtained, including height, weight, tricep and calf skinfolds and electrical impedance; the body fat assessments were administered twice for a subsample to determine reliability. Following the work of Cureton and his colleagues, VO2 was estimated from the run test with mile run time, body mass index (BMI), age, and gender as the predictors; this field test yielded a fairly strong relationship (R = 0.763; SEE = 6.34) with the treadmill score. Peak O2 was also estimated from the step test using a multiple regression equation with O2 cost of stepping, final heart rate, gender, and an estimate of body fat as the predictors. First, an equation using electrical impedance as the body fat estimate was examined, yielding a moderate relationship with the treadmill score (R = 0.634; SEE = 7.69). A second regression equation was also conducted, using the sum of two skin folds as the body fat estimate; this produced a slightly lower relationship with treadmill peak O2 (R = 0.56; SEE = 8.24). Interestingly, however, using the Bland-Altman method of viewing the data, the step test estimates were more accurate overall, with more subjects falling within two standard deviations of the mean difference for the step test as compared to the running test. Given these results it appears that the one-mile run/walk is superior than the step test in predicting cardiovascular fitness but not necessarily assessing cardiovascular fitness. We recommend repeating this study in a school setting where a broader and more realistic range of fitness abilities and motivation levels will be captured than was achieved with this highly motivated sample. Supported by the University of Michigan Undergraduate Reasearch Opportunity Program
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,009 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».