Introduction: Tests of physical performance are important tools for kinematic-functional assessment. Physical fitness requires good balance, muscle strength, power, and endurance, which are associated with good neuromuscular control and sensory-motor integration. The Upper Quarter Y Balance Test (UQYBT) is considered an objective measure of reporting and is regarded as a reliable test for assessing unilateral upper limb function in a closed kinetic chain. It evaluates the stability and mobility of the shoulder joint while challenging trunk rotation components and core stability. Objective: To determine if there is a relationship between UQBT and trunk muscle endurance, hand grip strength, gender, body mass index, shoulder range of motion, and the direction of UQYBT performance in healthy subjects. Methods: The study included 35 voluntary participants (24 females, 11 males, age: 21.34 ± 1.37 years, body mass: 69.4 ± 13.0 kg, height: 171.4 ± 8.8 cm, body mass index: 23.51 ± 3.02 kg/cm2). The variables included in the statistical analysis were the reach distance expressed as a percentage of the normalized upper limb length, plank position holding time, grip strength, and range of motion. Bivariate correlation and independent samples t-test were used for statistical analysis. Results: A statistically significant correlation was found between plank position holding time and grip strength (p < 0.002) with longer reach distance in UQYBT (p < 0.05). There were no statistically significant differences between genders and body mass index in the test performance. A statistically significant correlation was also found between the lower range of motion of internal rotation and longer reach in mediolateral and superolateral directions in UQYBT (p < 0.034; p < 0.007). Discussion and Conclusion: Based on the results, it can be concluded that there is a relationship between greater trunk muscle endurance, higher grip strength, and the lower range of motion of internal rotation with UQYBT performance.
|
