Aydin, GamzeKendal, KubraSurenkok, Ozgur2026-02-152026-02-1520261824-74901825-123410.1007/s11332-025-01591-82-s2.0-105026594173https://doi.org/10.1007/s11332-025-01591-8https://hdl.handle.net/20.500.14517/8762Aydin, Gamze/0000-0002-4952-2825; Surenkok, Ozgur/0000-0003-1558-8989Purpose To examine the relationship between body composition, physical fitness and cardiometabolic risk level in sedentary adults. Methods This cross-sectional study included 125 participants, with a mean age of 31.86 +/- 9.21 years. Participants' body composition was assessed through Body Mass Index (BMI), physical fitness were measured using the Senior Fitness Test Battery; cardiometabolic risk was evaluated by recording resting heart rate, blood pressure, lipid markers, fasting blood glucose, HbA1c, and the Framingham Risk Score (FRS). Results BMI showed negative correlations with the 6-min walk test (6-MWT), 30-s-chair-stand test and sit-and-reach test ((r = - 0.530, r = - 0.494; r = - 0.214, p < 0.05, respectively). The BMI was found to have a correlation with total cholesterol, LDL/HDL cholesterol, systolic/diastolic blood pressure, fasting blood glucose level, HbA1c, FRS, and its percentage(r = 0.358, r = 0.464, r = - 0.352, r = 0.340, r = 0.298, r = 0.428, r = 0.539, r = 0.489; r = 0.380; p < 0.05, respectively). In the regression analysis, HbA1c and FRS were factors predicting BMI in a positive direction (beta = 2.802, p < 0.001;beta = 0.203, p < 0.001, respectively) and the 6-MWT, 30-s-chair-stand test, and 8-foot-up-and-go test (beta = - 0.015, p < 0.001;beta = - 0.231, p = 0.013;beta = - 0.321, p = 0.035, respectively) were parameters predicting BMI. Conclusions BMI was associated with adverse cardiometabolic risk and reduced physical fitness, with HbA1c, FRS, 6-MWT, 30-s-chair-stand test, and 8-foot-up-and-go test identified as key predictors, highlighting the interplay between body composition and health outcomes in sedentary adults.eninfo:eu-repo/semantics/closedAccessCardiometabolic RiskObesityOverweightPhysical FitnessSedentary BehaviorArticle