Concurrent validity of two-dimensional video analysis of lower-extremity frontal plane of movement during multidirectional single-leg landing. (March 2020)

• Record Type: Journal Article
• Authors: Alahmari, Ahmed; Herrington, Lee; Jones, Richard
• Is Part Of: Physical therapy in sport. Volume 42(2020)
• Page Start: 40
• Page End: 45
• Publication Date: 2020-03
• Subjects: Assessment -- Kinematics -- Landing; Sports physical therapy -- Periodicals; Sports injuries -- Patients -- Rehabilitation -- Periodicals; Athletic Injuries -- diagnosis -- Periodicals; Athletic Injuries -- therapy -- Periodicals; Physical Therapy -- Periodicals; Sports Medicine -- Periodicals; 615.82088796
• DOI: 10.1016/j.ptsp.2019.12.009
• Languages: English
• ISSNs: 1466-853X

Abstract

Abstract: Objectives: Establish the concurrent validity between 2D video analysis and 3D motion analysis of frontal plane lower limb movements during multidirectional landing tasks. Design: Correlation study. Setting: University Biomechanics laboratory. Participants: 34 (19 male, 15 female) uninjured physical active individuals. Main outcome measures: knee abduction and hip adduction angles during a variety of single leg landing tasks. Results: 2D knee abduction showed an association with 3D knee abduction angle ranging from r = 0.17–0.42 across the tasks, with r 2 values ranging between 0.03 and 0.17. 2D hip adduction angle in both legs reported a strong and significant correlation with 3D hip adduction angle, ranging from r = 0.70–0.90 across all tasks. Linear regression analysis (r 2 ) revealed that 49–81% of 3D hip adduction angle can be explained by 2D measurement. Conclusion: It might be difficult to explain 3D knee abduction angle using 2D video analysis during single leg landing tasks, whereas 2D hip adduction angle is a strong predictor or 3D hip adduction angle. It would appear 2D video analysis has strong concurrent validity when assessing hip adduction angle, but it is weak when assessing knee abduction angle during a variety of single leg landing tasks. Highlights: 2D video measured hip adduction angle strongly relates to equivalent 3D measures during single leg landing. 2D video measured knee abduction angle poorly relates to equivalent 3D measures during single leg landing. Validity of 2D video analysis appears to be task and joint specific not universal.