Comparison of Several Anthropometric Indices Related to Body Fat in Predicting Cardiorespiratory Fitness in School-Aged Children—A Single-Center Cross-Sectional Study

Body fat (BF) and cardiorespiratory fitness (CRF) are important health markers that ought to be considered in screening exams. The aim of this study was assess the value six indicators, i.e., tri-ponderal mass index (TMI), relative (RFM), waist–BMI ratio, waist-to-height ratio (WHtR), waist-to-hip (WHR) body (BMI) predicting CRF school-aged children. analysis based on data coming from examination 190 children participating school physical education (PE) classes. Their weight (BW) height (BH), waist hip circumference (WC; HC) percentage (%BF) were measured; test performed with use 20 m shuttle run (20 mSRT); peak heart rate (HRpeak) TMI, pediatric (RFMp), WHtR, BMI WHR calculated. Statistical mainly conducted using regression models. developed models, respect sex age children, revealed RFMp as strongest indicator (R2 = 51.1%) well weakest ones 39.2% R2 40.5%, respectively). In turned out comparable obtained by means bioimpedance (BIA) 50.3%), such it can used a simple measure prophylactic exams All these models statistically significant (p < 0.001).