The Effect Of High And Low Glycemic Index Meals On Soccer Tournament Performance
Notice bibliographique
Résumé
PURPOSE: Our purpose was to examine the effects of low- and high-glycemic index meals (composed mainly of lentils and potatoes, respectively) on metabolism and performance during two consecutive soccer matches separated by a three hour break, to simulate a soccer tournament. METHODS: Using a single-blind cross-over design, 10 trained soccer players (8 males, 2 females, 27.5 SD 8.2 y; maximal oxygen consumption = 52.5 SD 5.2 mL/kg × min) participated in two simulated soccer tournaments. Low-glycemic index or high-glycemic index meals matched for calorie content were consumed 2-hr before a 90-min treadmill soccer match simulation and 2 hours before a second treadmill soccer match simulation performed 3 hours after the first match. The two meal conditions were separated by at least seven days. Blood and breath samples were collected before and during each simulated soccer match to assess the utilization of carbohydrate and fat as fuel during exercise. The distance covered on five 1-min sprints (separated by 2.5-min rest) performed at the end of each simulated soccer match was used to assess performance. RESULTS: Blood glucose levels were significantly higher from 105 to 60 minutes before the first soccer match after consuming the high-glycemic index versus low-glycemic index meal (P < 0.01). Blood glucose levels were not different between meal conditions during the soccer matches. During the first 10 minutes of each soccer match, the ratio of carbohydrate to fat oxidation was significantly elevated by 2-4 fold during the high-glycemic index condition compared to the low-glycemic index condition (P < 0.05), with no other difference between meal conditions for the rest of the soccer matches. There were no differences between meal conditions for ratings of perceived exertion during the soccer matches or sprint performance at the end of the soccer matches. CONCLUSIONS: Although performance indictors were similar between meal conditions under our testing protocol, low-glycemic index meals consumed before two consecutive soccer matches resulted in an improved metabolic profile compared to high-glycemic meals (i.e. reduced carbohydrate oxidation relative to fat oxidation). Supported by Saskatchewan Pulse Growers and NSERC
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,003 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| 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) | 0,000 | 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 tête enseignante, 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 ».