Abstract
[Purpose] To investigate the effects of pelvic tilt on trunk function and on change in sitting pressure during a side reach test performed by healthy subjects. [Subjects and Methods] Trunk range of motion, muscle strength and sitting pressure of 19 right-handed healthy subjects (mean age: 20.2 years) sitting upright were measured during left and right side reach tests with the pelvis in the neutral and posterior positions. The relationship of trunk function and sitting pressure in the different pelvic tilt positions was analyzed. [Results] Side reach distance was significantly shorter with posterior pelvic tilt than in the neutral position. Particularly during the right side reach test, the left trunk muscle strength correlated with shift in the center of gravity in the frontal plane. [Conclusion] Pelvic position may affect side reach distance. The distance is related to trunk side flexion muscle strength, which is a factor in sideward shift in the center of gravity.
