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Abstract：
The objectives of this study were to (1) compare peak expiratory flow (PEF), physical activity (PA), and core performance among normal-weight, overweight, and obese adolescents and (2) explore the relationships between PEF, physical activity, core performance, and anthropometric measurements across these groups. Ninety adolescents aged 10-13 yr were categorized based on BMI: normal weight (n = 30, 5th to < 85th percentile, BMI-Z score -2 to < 1), overweight (n = 30, 85th to < 95th percentile, BMI-Z score 1 to < 2), and obese (n = 30, > 95th percentile, BMI-Z score > 2). PEF and percent-predicted values of PEF (PEF% pred) values were calculated. Waist and neck circumferences were measured. Physical activity levels were assessed using the Physical Activity Questionnaire for Older Children (PAQ-C), from which total and subscores were derived. Core performance was evaluated through modified push-up (MPU) and sit-up tests. The PEF% pred and PAQ-C scores showed no significant differences between groups (p > 0.05). However, MPU repetition rates were significantly lower in obese adolescents compared to overweight (p = 0.019) and normal-weight peers (p < 0.001). There was a significant correlation between PEF% pred and PAQ-C total scores (p = 0.014), as well as out-of-school subscores (p = 0.039) in overweight adolescents. Similarly, PEF% pred was linked to MPU repetitions in obese adolescents (p = 0.029). Obese adolescents exhibited decreased core performance relative to their overweight and normal-weight counterparts, which correlated with the PEF% pred. Physical activity was associated with PEF% pred exclusively in overweight adolescents.
摘要：
本研究的目的是(1)比较峰值呼气流量(PEF)，身体活动（PA），和核心性能在正常体重中，超重,和肥胖青少年，以及(2)探索PEF，身体活动,核心性能，以及这些群体的人体测量。根据BMI对90名10-13岁的青少年进行分类：正常体重（n=30，第5至<85百分位数，BMI-Z评分-2至<1），超重(n=30，第85至<95百分位数，BMI-Z评分1至<2），和肥胖(n=30，>95百分位数，BMI-Z评分>2)。计算PEF和PEF的百分比预测值(PEF%pred)值。测量腰围和颈围。身体活动水平使用大龄儿童身体活动问卷（PAQ-C）进行评估，从中得出总分和子分数。通过改进的俯卧撑（MPU）和仰卧起坐测试评估了核心性能。PEF%pred和PAQ-C评分组间差异无统计学意义(p>0.05)。然而,与超重（p=0.019）和体重正常的同龄人（p<0.001）相比，肥胖青少年的MPU重复率明显较低。PEF%pred和PAQ-C总分之间存在显著相关性(p=0.014)，以及超重青少年的校外分（p=0.039）。同样，PEF%pred与肥胖青少年MPU重复相关(p=0.029)。肥胖青少年表现出相对于超重和正常体重的核心表现下降，与PEF%pred相关。仅在超重青少年中，身体活动与PEF%pred相关。
