Document Type

Article

Publication Date

11-2019

Publication Source

Physical Therapy in Sport

Abstract

Objective: Establish between-day test-retest reliability metrics for 2-dimensional frontal plane projection angles (FPPAs) during the lateral step-down (LSD), single-limb squat (SLS), single-limb landing (SLL), and drop vertical jump (DVJ).

Design: Test-retest reliability study

Setting: University laboratory

Participants: 20 healthy adults (12 female, age = 23.60±1.93 years old, body mass index = 24.26±2.54 kg/m2) were tested on 2 separate occasions 7-14 days apart.

Main Outcome Measures: Intraclass correlation coefficients (ICC), standard errors of the measurement (SEM), and minimal detectable change (MDC) values across the LSD, SLS, SLL, and DVJ for the following body region variables: trunk, trunk on pelvis, pelvis, hip, thigh to vertical, knee, and shank to vertical.

Results: There was moderate-to-substantial between-day test-retest reliability for nearly all body regions across all tasks (ICC = 0.65-0.96). SEM values varied across body regions and tasks (0.9-3.5 degrees). MDCs were variable (2.3-9.8 degrees). Of the body regions, MDCs were largest for the knee and hip. By task, MDCs were lowest for the LSD.

Conclusions: This study identified between-day test-retest reliability metrics for 2-dimensional FPPAs across a variety of body regions during commonly assessed clinical tasks. These data allow clinicians and researchers to more confidently assess true change between assessments or over time.

Inclusive pages

169-176

ISBN/ISSN

1466-853X

Document Version

Postprint

Comments

Document available for download is the authors' accepted manuscript, provided in compliance with the publisher's policy on self-archiving. Permission documentation is on file.

Publisher

Elsevier

Volume

40

Peer Reviewed

yes

Keywords

dynamic valgus, injury risk, hip, knee, trunk

Embargoed until Saturday, October 31, 2020

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