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Phys Ther Sport. 2018 Sep;33:40-47. doi: 10.1016/j.ptsp.2018.06.009. Epub 2018 Jun 30.

Test-retest reliability of two-dimensional video analysis during running.

Author information

1
Rehabilitation Research Centre, Biomedical Research Institute, Faculty of Medicine and Life Sciences, UHasselt, Diepenbeek, Belgium. Electronic address: bart.dingenen@uhasselt.be.
2
La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, La Trobe University, Bundoora, Victoria, Australia; Complete Sports Care, Hawthorn, Victoria, Australia; Department of Surgery, St Vincent's Hospital, University of Melbourne, Australia.
3
Rehabilitation Research Centre, Biomedical Research Institute, Faculty of Medicine and Life Sciences, UHasselt, Diepenbeek, Belgium.
4
Complete Sports Care, Hawthorn, Victoria, Australia; Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Clayton, Victoria, Australia.

Abstract

OBJECTIVES:

To examine test-retest reliability of two-dimensional measured frontal and sagittal plane kinematics during running, and to determine how many steps to include to reach and maintain a stable mean.

DESIGN:

Reliability study.

SETTING:

Research laboratory.

PARTICIPANTS:

Twenty-one recreational runners.

MAIN OUTCOME MEASURES:

Lateral trunk position, contralateral pelvic drop, femoral adduction, hip adduction, knee flexion and ankle dorsiflexion during midstance, and foot and tibia inclination at initial contact were measured with two-dimensional video analysis during running for 10 consecutive steps for both legs. All participants were tested twice one week apart. A sequential estimation method was used to determine the number of steps needed to reach a stable mean. Intraclass correlation coefficients (ICC) and smallest detectable differences (SDD) were calculated.

RESULTS:

The minimal number of steps was 6.3 ± 0.3. Lateral trunk position, femoral adduction and foot inclination showed excellent reliability (ICC 0.90-0.99; SDD 1.3°-2.3°). Tibia inclination and ankle dorsiflexion showed good to excellent reliability (ICC 0.73-0.92; SDD 2.2°-4.8°). Hip adduction and knee flexion showed good reliability (ICC 0.82-0.89; SDD 2.3°-3.8°). Contralateral pelvic drop showed moderate to good reliability (ICC 0.59-0.77; SDD 2.7°-2.8°).

CONCLUSION:

Two-dimensional video analysis is reliable to assess running kinematics on different days. The mean of at least 7 steps should be included.

KEYWORDS:

Kinematics; Reliability; Running; Two-dimensional video analysis

PMID:
30005426
DOI:
10.1016/j.ptsp.2018.06.009
[Indexed for MEDLINE]

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