Validity of the four square step test to assess dynamic balance, step velocity and displacement

Noel Lythgo, Jayden Hunter, Amanda C Benson, Brett Gordon

    Research output: Book chapter/Published conference paperConference paperpeer-review

    Abstract

    The four square step test (FSST) is commonly used to assess dynamic standing balance in elderly adult populations. To date, only the time (recorded by a stop-watch) to complete the test has been used. Other important dynamic balance information such as step velocity and step displacement can be extracted. This study re-examined the validity of recording the FSST time with a stop-watch by comparing it to a "gold standard" method (Vicon) and investigated the relationship between FSST stop-watch time and measures of step velocity, step displacement, and age. After familiarization, forty-one healthy adults (42 ± 12 yrs.) completed three FSST trials. The FSST time was recorded by a stop-watch and the participants' foot movements were simultaneously recorded by a Vicon motion system (120 Hz). Measures extracted from the Vicon system were FSST time, step velocity (four directions) and step displacement (four directions). A paired t-test was used to compare FSST time recorded by each system. Pearson's correlation analyses were conducted to identify relationships between measures. No significant difference was found between the FSST time recorded by the methods (mean difference = 0.02 ± 0.11 s). Moreover, a strong positive linear relationship (r = 0.99, p < 0.0001) was found between the FSST time recorded by the methods. A moderate linear relationship was found between the FSST time (Vicon) and step velocity (r = 0.67, p < 0.0001). Poor linear relationships were found between (1) step velocity and step displacement, (2) FSST time (Vicon) and step displacement, (3) FSST time (both methods) and age, (4) age and step velocity, and (5) age and step dis-placement. In conclusion, the FSST stop-watch method is valid. Moreover, it may be used to predict step velocity but not step displacement. No relationship was found between age and the FSST time, step velocity or step displacement.
    Original languageEnglish
    Title of host publication6th International Conference on the Development of Biomedical Engineering in Vietnam (BME6)
    EditorsToi Vo Van, Thanh An Nguyen Le, Thang Nguyen Duc
    PublisherSpringer
    Pages157-160
    Number of pages3
    ISBN (Electronic)9789811043611
    ISBN (Print)9789811043604
    DOIs
    Publication statusPublished - 2018
    Event6th International Conference on the Development of Biomedical Engineering (BME6) - Ho Chi Minh City, Vietnam, Viet Nam
    Duration: 27 Jun 201629 Jun 2016
    https://www.springer.com/gp/book/9789811043604 (Online proceedings)

    Publication series

    NameIFMBE Proceedings
    Volume63

    Conference

    Conference6th International Conference on the Development of Biomedical Engineering (BME6)
    Country/TerritoryViet Nam
    Period27/06/1629/06/16
    Internet address

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