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Reliability of a Clinical Kinematic Assessment of the Sit-to-Stand Movement

S-F Jeng, MS, PT, is a doctoral student, Department of Physical Therapy, Sargent College of Allied Health Professions, Boston University, 1 University Rd, Boston, MA 02215.
M Schenkman, PhD, PT, is Assistant Professor, Program in Physical Therapy, MGH Institute of Health Professions, 15 River St, Boston, MA 02108-3402 (USA).
P Riley, PhD, is Technical Director, MGH Biomotion Laboratory, Massachusetts General Hospital, Boston, MA 02114.
S-J Lin, MS, PT, is Staff Physical Therapist, Lawrence Memorial Hospital of Medford, 170 Governors Ave, Medford, MA 02155.
This study was completed in partial fulfillment of the requirements for Ms Jeng's master's degree in physical therapy, MGH Institute of Health Professions.

We examined the reproducibility of a kinematic assessment of the sit-to-stand movement in 15 healthy subjects using a standardized protocol. We examined the within-rater and between-rater reliability of the assessment using a clinically feasible method, the video-goniometric measurement method, to analyze the task. Two variables were measured to characterize the sit-to-stand movement: 1) joint angles for four body segments (head, trunk, knee, and ankle) and 2) three events (maximal trunk flexion, lift-off, and maximal trunk extension). High reproducibility was found for all joint angles, except for the head angle. Both within-rater and between-rater goniometric measurements were highly reliable (ICC > .80). Identification of the events was reproducible within raters and between different raters. We conclude that this method can lead to reliable assessments of a healthy population. The reliability data established in this study can be used to help clinicians determine the impairments of patients.

Key Words: Functional movement • Kinesiology/biomechanics, sit-to-stand analysis • Tests and measurements, functional

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