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The Kinematic Relationship Between Two Spinal Regions and the Hip During Transitions From Standing to Sitting and
1Department of Rehabilitation Science, Physiotherapy Program, College of Applied Medical Science, Najran University, Najran, Saudi Arabia, nu.edu.sa.
Background:
Previous studies have explored the kinematic relationship between the hip and lumbar spine during daily living activities. However, it is crucial to demonstrate the relationship between the hip, thoracic spine, and lumbar spine against hip kinematics during standing-to-sitting (SD-to-ST) and sitting-to-standing (ST-to-SD) tasks.
Objectives:
The study aimed to investigate the correlation between hip and thoracic kinematics, as well as hip and lumbar kinematics, during SD-to-ST and ST-to-SD tasks, and compare lumbar values with previous studies.
Methods:
A convenience-based cohort study design was employed, and 29 males from the Najran University population were recruited (age = 30 years; mass = 73 kg). Double-sided tape was used to attach four sensors to the spinous processes of T1, T12, and S1 and the side of the thigh in order to measure the range of motion (ROM) and velocity of the hip and two spinal regions during SD-to-ST and ST-to-SD.
Results:
The study found that hip ROM during SD-to-ST and ST-to-SD tasks was consistent at 64°, while thoracic and lumbar ROM were -1° and 48.75° for SD-to-ST and -10° and 47.81° for ST-to-SD, respectively. Hip velocity was similar at 62 and 65° s-1, and thoracic and lumbar velocities were 24 and 49.87° s-1 and 22 and 26.47° s-1, respectively.
Interpretation:
The study found no correlation between hip and thoracic spine in terms of ROM and velocity, and no correlation between regions. However, ROM and velocity significantly varied between regions. The lumbar spine outcomes were similar to previous research findings.
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