Obesity and Diabetes Clinical Research Section, Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, AZ, USA.
Human-Centered Mobility Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
Eur J Clin Nutr. 2024 Jan;78(1):27-33. doi: 10.1038/s41430-023-01347-y. Epub 2023 Oct 13.
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.
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.
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.
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.
ClinicalTrials.gov identifiers: NCT00340132, NCT00342732.
能量代谢的季节性变化是否存在尚不确定。我们研究了季节与自发性体力活动（SPA）、能量消耗（EE）和呼吸室测量的其他成分之间的关系。
1985 年至 2005 年期间，亚利桑那州凤凰城的 671 名健康成年人（年龄 28.8±7.1 岁；403 名男性）在配备雷达传感器的呼吸室内停留 24 小时；测量 SPA（以时间段内的百分比表示）、SPA 的能量消耗、EE 和呼吸交换比（RER）。
在调整了已知协变量的模型中，与冬季（8.3±3.5，参考）相比，夏季（7.2±2.9，p=0.0002）、春季（7.5±2.9，p=0.025）和秋季（7.6±3，p=0.038）的 SPA（%）较低。相反，夏季（2.18±0.83，p=0.0008）、春季（2.186±0.83，p=0.017）和秋季（2.146±0.75，p=0.038）的 SPA 能量消耗（kcal/h/%)高于冬季（2.006±0.76）。与冬季相比，夏季的蛋白质（292±117kcal/天，β=-21.2，p=0.08）氧化率较低。碳水化合物和脂质氧化率（kcal/天）在不同季节没有差异。RER 和 24 小时 EE 不因季节而异。
在居住在沙漠气候中的人群中，代表室内坐立不安行为的 SPA 表现出冬季高峰和夏季低谷。这些发现表明，运动的生理倾向可能受季节性因素影响。
ClinicalTrials.gov 标识符：NCT00340132、NCT00342732。
