Concurrent validity of two-dimensional video analysis of lower-extremity frontal plane of movement during multidirectional single-leg landing

Alahmari, A; Herrington, LC; Jones, R

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 r² values ranging between 0.03-0.17. 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 (r²) 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.

Citation

Alahmari, A., Herrington, L., & Jones, R. (2020). Concurrent validity of two-dimensional video analysis of lower-extremity frontal plane of movement during multidirectional single-leg landing. Physical Therapy in Sport, 42, 40-45. https://doi.org/10.1016/j.ptsp.2019.12.009

• Journal Article Type: Article
• Acceptance Date: Dec 21, 2019
• Online Publication Date: Dec 23, 2019
• Publication Date: Mar 1, 2020
• Deposit Date: Jan 21, 2020
• Publicly Available Date: Dec 23, 2020
• Journal: Physical Therapy in Sport
• Print ISSN: 1466-853X
• Publisher: Elsevier
• Volume: 42
• Pages: 40-45
• DOI: https://doi.org/10.1016/j.ptsp.2019.12.009
• Publisher URL: https://doi.org/10.1016/j.ptsp.2019.12.009
• Related Public URLs: https://www.sciencedirect.com/journal/physical-therapy-in-sport