INVESTIGATION OF THE EFFECTS OF POSTURE AND BALANCE CHARACTERISTICS ON LOWER EXTREMITY AND CORE STRENGTH RATIOS IN SEDENTARY INDIVIDUALS AGED 30–50 YEARS

Objectıve: The aim of this study was to investigate the effects of posture and balance characteristics on lower extremity and core strength ratios in sedentary individuals aged 30–50 years. Methods: A total of 30 sedentary individuals (15 females and 15 males) aged between 30 and 50 years voluntarily participated in the study. Participants with any physical or metabolic disorders or high physical activity levels were excluded. Physical measurements included height, body weight, and body mass index. Dynamic posture was assessed using overhead squat and single-leg squat analyses. Maximal isometric strength of the lower extremity and core region (flexion, extension, and lateral flexion) was measured using Leg-Check and Back-Check devices. Balance performance was evaluated using the Balance-Check system. Statistical analyses were conducted using SPSS 26. Independent samples t-test and Pearson correlation analysis were applied, with significance set at p < 0.05. Results: Male participants exhibited significantly greater height, body weight, and body mass index compared to females (p < 0.05), whereas female participants demonstrated significantly higher core strength ratios (p = 0.037). Significant correlations were identified between knee valgus movement and balance performance in both genders. Additionally, notable relationships were observed between postural deviations, balance scores, and strength ratios of the lower extremity and core region. Conclusion: The findings suggest that postural deviations, particularly inward knee movement and excessive lumbar lordosis, may negatively influence balance and lower extremity mechanics in sedentary individuals. These results highlight the importance of postural assessment and targeted strength interventions in sedentary populations.