Exercise and negative energy balance in males who perform mental work
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Résumé
Summary What is already known about this subject Achievement of a stressful mental task leads to increased energy intake over a short period of time. Given that mental work does not increase energy expenditure, a positive energy balance is observed. What this study adds The single fact of waiting and relaxing after mental work does not reduce energy intake. Thirty minutes of physical activity performed at moderate/high intensity between mental work and a meal is enough to create a energy deficit compare to a situation where the meal directly follows mental work. Background Although energy expenditure during mental work is not higher than energy expenditure at rest, a stressful mental task is related to an increase in energy intake. It is suggested that mental work produces physiological changes, thereby influencing food intake. Objective Because physical activity can influence hunger, the aim of the study was to determine if the introduction of an active pause could counteract the negative effects of mental work on energy intake and energy balance. Method Twelve male students, of normal weight, between 15 and 20 years old were evaluated. All subjects participated in three different sessions realized in a randomized order: (i) without pause = relaxation/mental work/meal; (ii) relaxation pause = mental work/relaxation/meal; and (iii) exercise pause = mental work/exercise/meal. Energy expenditure was measured with indirect calorimetry, energy intake was measured with a cold buffet‐type meal of 40 items, and appetite‐related sensations were measured with visual analogue scales. The effect of introducing an active pause in energy intake and energy balance was studied. Results The introduction of an active pause did not influence energy intake; although, higher appetite‐related sensations were observed (16–26 mm on a 150‐mm scale; P < 0.05). After accounting for the energy expenditure related to physical activity, a lower energy balance was measured for the exercise pause visit compared with the visit without a pause (−1137 kJ; P < 0.05). Conclusion This study indicates that being active between mental work and a meal could represent a strategy to create a negative energy balance following mental work via an increased energy expenditure and a maintenance of energy intake. Globally, these results could help individuals attain and/or maintain a healthy body weight in a context where mental work is omnipresent.
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Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| 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) | 0,000 | 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 découle