Popp Collin J, Jesch Elliot D
Department of Population Health, Institute for Excellence in Health Equity, NYU Langone Health, New York, NY, United States.
Department of Food, Nutrition and Packaging Sciences, Clemson University, Clemson, SC, United States.
Front Sports Act Living. 2025 Jul 24;7:1583432. doi: 10.3389/fspor.2025.1583432. eCollection 2025.
PURPOSE: Cardiorespiratory fitness (CRF) independently predicts cardiovascular disease risk and mortality. In addition, body composition levels characterized by excess adiposity (fat mass) and low levels of fat-free mass (FFM) are strongly associated with poor health status. The relationship between CRF and body composition, especially indices adjusted for height [fat mass index (FMI), fat-free mass index (FFMI)] has not been well established in otherwise healthy adults. METHODS: A sample ( = 82) of adults completed measures for body composition using dual-energy x-ray absorptiometry and estimated V˙O by way of an Åstrand-Rhyming submaximal cycle ergometer test. Total daily energy expenditure (TDEE) and moderate-to-vigorous physical activity (MVPA) were measured using a SenseWear Armband activity monitor. The associations between body composition (FMI, FFMI), and CRF were examined using multiple linear regression models adjusting for sex (model 1) and TDEE (model 2). RESULTS: Participants were young (age: 24 ± 9 year), 64% female, with a BMI of 25.4 ± 4.9 kg·m. The mean absolute and relative estimated V̇O were 3.02 ± 1.0 L·min and 42.1 ± 12.2 ml·kg·min, respectively. FMI was negatively associated CRF (L·min) in model 2 ( = -0.106, 95%CI -0.16, -0.05, < 0.001) but not model 1 ( = -0.011, 95%CI -0.03, 0.01, = 0.271). FFMI was positively associated with CRF (L·min) (model 1: = 0.087, 95%CI 0.03, 0.14), = 0.004) but not after adjusting for TDEE (model 2: = 0.026, 95%CI -0.07, 0.12, = 0.585). CONCLUSION: FM adjusted for height (FMI), but not fat-free mass (FFMI), is negatively associated with cardiorespiratory fitness in adults.
目的：心肺适能（CRF）可独立预测心血管疾病风险和死亡率。此外，以肥胖（脂肪量）过多和去脂体重（FFM）水平低为特征的身体成分水平与健康状况不佳密切相关。在其他方面健康的成年人中，CRF与身体成分之间的关系，尤其是经身高调整的指标[脂肪量指数（FMI）、去脂体重指数（FFMI）]尚未得到充分确立。 方法：82名成年人的样本通过双能X线吸收法完成了身体成分测量，并通过阿斯兰德-瑞明次最大运动强度自行车测力计测试估算了V˙O。使用SenseWear臂带活动监测器测量每日总能量消耗（TDEE）和中度至剧烈身体活动（MVPA）。使用多线性回归模型，在调整性别（模型1）和TDEE（模型2）后，检验身体成分（FMI、FFMI）与CRF之间的关联。 结果：参与者较为年轻（年龄：24±9岁），64%为女性，体重指数为25.4±4.9 kg·m。平均绝对和相对估算V̇O分别为3.02±1.0 L·min和42.1±12.2 ml·kg·min。在模型2中，FMI与CRF（L·min）呈负相关（β = -0.106，95%CI -0.16，-0.05，P < 0.001），但在模型1中并非如此（β = -0.011，95%CI -0.03，0.01，P = 0.271）。FFMI与CRF（L·min）呈正相关（模型1：β = 0.087，95%CI 0.03，0.14，P = 0.004），但在调整TDEE后并非如此（模型2：β = 0.026，95%CI -0.07，0.12，P = 0.585）。 结论：经身高调整的脂肪量（FMI）而非去脂体重（FFMI）与成年人的心肺适能呈负相关。
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