Kinematics during lower extremity functional screening tests in young athletes - are they reliable and valid?

Chris Whatman, Patria Hume, Wayne Hing

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)

Abstract

OBJECTIVE: To determine if lower extremity functional tests are reliable and valid screening tests of lower extremity dynamic alignment in healthy young athletes.

DESIGN: Quantitative experimental test-re-test.

METHODS: Peak three-dimensional pelvis and lower extremity kinematics were quantified in 23 uninjured young athletes (11 ± 1 years) during three lower extremity functional tests (Small Knee Bend [SKB], Single Leg SKB and Drop Jump) and Running. A nine camera motion analysis system captured three trials of all tests. All functional tests were repeated by 10 young athletes eight to ten weeks later. Visual 3D and Labview were used to process all data. Intraclass correlation coefficients (ICC) and typical errors (TE) were used to assess within- and between-day reliability of all variables. Pearson correlation coefficients were used to evaluate associations between peak kinematics during the SKB and Drop Jump and between the Single Leg SKB and Running.

RESULTS: Within-day reliability was excellent (ICC ≥ 0.85) and between-day reliability was excellent to good (ICC range 0.60-0.92) for the majority of kinematic variables. Correlations for peak lower extremity kinematics between SKB and Drop Jump were moderate to very large (r = 0.39-0.87) as were correlations between Single Leg SKB and Running (r = 0.45-0.84).

CONCLUSIONS: Kinematics during the SKB and single leg SKB have moderate to high reliability and are similar to those during a drop jump or running.

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalPhysical Therapy in Sport
Volume14
Issue number2
Early online date22 Oct 2012
DOIs
Publication statusPublished - 2013
Externally publishedYes

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Biomechanical Phenomena
Athletes
Lower Extremity
Knee
Leg
Pelvis

Cite this

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title = "Kinematics during lower extremity functional screening tests in young athletes - are they reliable and valid?",
abstract = "OBJECTIVE: To determine if lower extremity functional tests are reliable and valid screening tests of lower extremity dynamic alignment in healthy young athletes.DESIGN: Quantitative experimental test-re-test.METHODS: Peak three-dimensional pelvis and lower extremity kinematics were quantified in 23 uninjured young athletes (11 ± 1 years) during three lower extremity functional tests (Small Knee Bend [SKB], Single Leg SKB and Drop Jump) and Running. A nine camera motion analysis system captured three trials of all tests. All functional tests were repeated by 10 young athletes eight to ten weeks later. Visual 3D and Labview were used to process all data. Intraclass correlation coefficients (ICC) and typical errors (TE) were used to assess within- and between-day reliability of all variables. Pearson correlation coefficients were used to evaluate associations between peak kinematics during the SKB and Drop Jump and between the Single Leg SKB and Running.RESULTS: Within-day reliability was excellent (ICC ≥ 0.85) and between-day reliability was excellent to good (ICC range 0.60-0.92) for the majority of kinematic variables. Correlations for peak lower extremity kinematics between SKB and Drop Jump were moderate to very large (r = 0.39-0.87) as were correlations between Single Leg SKB and Running (r = 0.45-0.84).CONCLUSIONS: Kinematics during the SKB and single leg SKB have moderate to high reliability and are similar to those during a drop jump or running.",
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Kinematics during lower extremity functional screening tests in young athletes - are they reliable and valid? / Whatman, Chris; Hume, Patria; Hing, Wayne.

In: Physical Therapy in Sport, Vol. 14, No. 2, 2013, p. 87-93.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Kinematics during lower extremity functional screening tests in young athletes - are they reliable and valid?

AU - Whatman, Chris

AU - Hume, Patria

AU - Hing, Wayne

N1 - Copyright © 2012 Elsevier Ltd. All rights reserved.

PY - 2013

Y1 - 2013

N2 - OBJECTIVE: To determine if lower extremity functional tests are reliable and valid screening tests of lower extremity dynamic alignment in healthy young athletes.DESIGN: Quantitative experimental test-re-test.METHODS: Peak three-dimensional pelvis and lower extremity kinematics were quantified in 23 uninjured young athletes (11 ± 1 years) during three lower extremity functional tests (Small Knee Bend [SKB], Single Leg SKB and Drop Jump) and Running. A nine camera motion analysis system captured three trials of all tests. All functional tests were repeated by 10 young athletes eight to ten weeks later. Visual 3D and Labview were used to process all data. Intraclass correlation coefficients (ICC) and typical errors (TE) were used to assess within- and between-day reliability of all variables. Pearson correlation coefficients were used to evaluate associations between peak kinematics during the SKB and Drop Jump and between the Single Leg SKB and Running.RESULTS: Within-day reliability was excellent (ICC ≥ 0.85) and between-day reliability was excellent to good (ICC range 0.60-0.92) for the majority of kinematic variables. Correlations for peak lower extremity kinematics between SKB and Drop Jump were moderate to very large (r = 0.39-0.87) as were correlations between Single Leg SKB and Running (r = 0.45-0.84).CONCLUSIONS: Kinematics during the SKB and single leg SKB have moderate to high reliability and are similar to those during a drop jump or running.

AB - OBJECTIVE: To determine if lower extremity functional tests are reliable and valid screening tests of lower extremity dynamic alignment in healthy young athletes.DESIGN: Quantitative experimental test-re-test.METHODS: Peak three-dimensional pelvis and lower extremity kinematics were quantified in 23 uninjured young athletes (11 ± 1 years) during three lower extremity functional tests (Small Knee Bend [SKB], Single Leg SKB and Drop Jump) and Running. A nine camera motion analysis system captured three trials of all tests. All functional tests were repeated by 10 young athletes eight to ten weeks later. Visual 3D and Labview were used to process all data. Intraclass correlation coefficients (ICC) and typical errors (TE) were used to assess within- and between-day reliability of all variables. Pearson correlation coefficients were used to evaluate associations between peak kinematics during the SKB and Drop Jump and between the Single Leg SKB and Running.RESULTS: Within-day reliability was excellent (ICC ≥ 0.85) and between-day reliability was excellent to good (ICC range 0.60-0.92) for the majority of kinematic variables. Correlations for peak lower extremity kinematics between SKB and Drop Jump were moderate to very large (r = 0.39-0.87) as were correlations between Single Leg SKB and Running (r = 0.45-0.84).CONCLUSIONS: Kinematics during the SKB and single leg SKB have moderate to high reliability and are similar to those during a drop jump or running.

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