Effects Of A Cross Country Running Season On Fitness And Immune Function In Women
Notice bibliographique
Résumé
PURPOSE The aims of this study were to assess 1) the effects of an aerobic training program on fitness and immune function in a group of novice female crosscountry runners and 2) the effects of an exhaustive bout of exercise on salivary immunoglobulin A (IgA), testosterone and cortisol levels before and after training. METHODS Subjects (11 females; 21.5 ± 2.9 years, 59.2 ± 6.2 kg, 164.9 ± 6.2 cm, means ± SD), with no or limited experience in cross-country running, were recruited to participate in this project. All participants completed a series of pre- and post-season tests consisting of anthropometric measurements, physical tests (aerobic fitness, squat jump and sit and reach tests) and collection of saliva for measurement of IgA, testosterone and cortisol concentrations. To assess the effects of an exhaustive bout of exercise before and after training, saliva was collected after an overnight fast pre- and post-season, at the same time of day, for 3 minutes, before and after a Léger Boucher 20m shuttle run leading to voluntary exhaustion. Salivary IgA, testosterone and cortisol levels were measured using commercially available ELISA kits. The participants were supervised while training 6 days per week, ± 1 hour per day, for the duration of the season (i.e. 10 weeks). The effects of a cross-country season on performance were assessed using a repeated measures ANOVA. The effects of an exhaustive bout of exercise before and after training on salivary IgA, cortisol, testosterone and testosterone to cortisol ratios were assessed using a 2 way ANOVA with repeated measures. RESULTS Aerobic fitness, as assessed by the field test, increased significantly following training (p=0.029). Flexibility and leg power did not change significantly. There was a significant increase in salivary testosterone concentration following training (p=0.022) while increases in IgA concentrations almost reached significance (p=0.060). The salivary testosterone to cortisol ratio did not change significantly in response to an acute bout of exhaustive exercise or in response to a season of training. Interestingly, there was a significant correlation between salivary IgA levels and testosterone concentrations (r=0.57). CONCLUSION These results demonstrate that, in young women, an intense cross-country season training program significantly improves aerobic fitness, and elevates salivary testosterone levels. There were limited effects on immune function, as assessed by salivary IgA concentrations, in response to an exhaustive exercise before and after the season, although there appears to be a relationship between increasing salivary testosterone and IgA levels. Supported by NSERC.
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 | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 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 ».