التفاصيل البيبلوغرافية
| العنوان: |
Investigation of seasonality of human spontaneous physical activity and energy expenditure in respiratory chamber in Phoenix, Arizona. |
| المؤلفون: |
Aydin, Beyza N., Stinson, Emma J., Cabeza De Baca, Tomás, Ando, Takafumi, Travis, Katherine T., Piaggi, Paolo, Krakoff, Jonathan, Chang, Douglas C. |
| المصدر: |
European Journal of Clinical Nutrition; Jan2024, Vol. 78 Issue 1, p27-33, 7p |
| مصطلحات موضوعية: |
ENERGY metabolism, RESPIRATORY quotient, BODY composition, NUTRITIONAL requirements, PHYSICAL activity, SEASONS, CLIMATOLOGY, RESEARCH funding, DESCRIPTIVE statistics, BODY temperature regulation, CALORIMETRY, SECONDARY analysis, OXIDATION-reduction reaction, PULMONARY gas exchange |
| مصطلحات جغرافية: |
ARIZONA |
| مستخلص: |
Objective: The existence of seasonal changes in energy metabolism is uncertain. We investigated the relationship between the seasons and spontaneous physical activity (SPA), energy expenditure (EE), and other components measured in a respiratory chamber. Methods: Between 1985–2005, 671 healthy adults (aged 28.8 ± 7.1 years; 403 men) in Phoenix, Arizona had a 24-hour stay in the respiratory chamber equipped with radar sensors; SPA (expressed as a percentage over the time interval), the energy cost of SPA, EE, and respiratory exchange ratio (RER) were measured. Results: In models adjusted for known covariates, SPA (%) was lower during summer (7.2 ± 2.9, p = 0.0002), spring (7.5 ± 2.9, p = 0.025), and fall (7.6 ± 3, p = 0.038) compared to winter (8.3 ± 3.5, reference). Conversely, energy cost of SPA (kcal/h/%) was higher during summer (2.18 ± 0.83, p = 0.0008), spring (2.186 ± 0.83, p = 0.017), and fall (2.146 ± 0.75, p = 0.038) compared to winter (2.006 ± 0.76). Protein (292 ± 117 kcal/day, β = −21.2, p = 0.08) oxidation rates was lower in the summer compared to winter. Carbohydrate and lipid oxidation rates (kcal/day) did not differ across seasons. RER and 24-h EE did not differ by season. Conclusion: SPA, representing fidgeting-like behavior in the chamber, demonstrated a winter peak and summer nadir in humans living in a desert climate. These findings indicate that the physiological propensity for movement may be affected by seasonal factors. Clinical trial registration: ClinicalTrials.gov identifiers: NCT00340132, NCT00342732 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |