The role of lifestyle behaviors on neck adipose tissue (NAT), a fat depot that appears to be involved in the pathogenesis of different cardiometabolic diseases and in inflammatory status, is unknown. In this cross-sectional and exploratory study, the authors examined the relationship between sedentary time and physical activity (PA) with neck adiposity in young adults. A total of 134 subjects (69% women, 23 ± 2 years) were enrolled. The time spent in sedentary behavior and PA of different intensity were objectively measured for 7 consecutive days (24 hr/day), using a wrist (nondominant)-worn accelerometer. The NAT volume was assessed using computed tomography, and the compartmental (subcutaneous, intermuscular, and perivertebral) and total NAT volumes were determined at the level of vertebra C5. Anthropometric indicators and body composition (by dual-energy X-ray absorptiometry) were determined. The time spent in light physical activity and moderate physical activity (MPA) and the overall PA were inversely associated with the intermuscular NAT volume in men, as were the MPA and overall PA with total NAT volume (all ps ≤ .04). Sedentary time was directly related to the total NAT volume (p = .04). An opposite trend was observed in women, finding a direct relationship of MPA with the subcutaneous NAT; of light physical activity, MPA, and overall PA with the perivertebral NAT; and of light physical activity with total NAT volumes (all ps ≤ .05). The observed associations were weak, and after adjusting for multiplicity, the results became nonsignificant (p > .05). These findings suggest that the specific characteristics of PA (time and intensity) might have sex-dependent implications in the accumulation of NAT.

生活方式行为对颈部脂肪组织 (NAT) 的作用是未知的，NAT 是一种似乎参与不同心脏代谢疾病的发病机制和炎症状态的脂肪库。在这项横断面和探索性研究中，作者检查了久坐时间和身体活动 (PA) 与年轻人颈部肥胖之间的关系。共招募了 134 名受试者（69% 为女性，23 ± 2 岁）。使用手腕（非主导）佩戴的加速度计连续 7 天（24 小时/天）客观地测量久坐行为和不同强度的 PA 所花费的时间。使用计算机断层扫描评估 NAT 体积，并在椎骨 C5 水平确定隔室（皮下、肌间和椎周围）和总 NAT 体积。确定了人体测量指标和身体成分（通过双能 X 射线吸收法）。轻度体力活动和中度体力活动 (MPA) 所花费的时间以及总 PA 与男性肌肉间 NAT 体积呈负相关，MPA 和总 PA 与总 NAT 体积呈负相关（所有p s ≤ .04)。久坐时间与总 NAT 体积直接相关 ( p  = .04)。在女性中观察到相反的趋势，发现 MPA 与皮下 NAT 有直接关系；轻度体力活动、MPA 和椎周 NAT 的整体 PA；以及具有总 NAT 体积的轻度体力活动（所有p s ≤ .05）。观察到的关联很弱，在调整多重性后，结果变得不显着 ( p  > .05)。这些发现表明，PA 的特定特征（时间和强度）可能对 NAT 的积累具有性别依赖性。