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Reliability, usefulness, and factorial validity of change-of-direction speed tests in adolescent basketball players

journal contribution
posted on 26.11.2019, 00:00 by E Stojanović, N Aksović, N Stojiljković, R Stanković, Aaron ScanlanAaron Scanlan, Z Milanović
Stojanović, E, Aksović, N, Stojiljković, N, Stanković, R, Scanlan, AT, and Milanović, Z. Reliability, usefulness, and factorial validity of change-of-direction speed tests in adolescent basketball players. J Strength Cond Res XX(X): 000-000, 2018-The purposes of this study were to (1) determine the reliability, usefulness, and factorial validity of change-of-direction speed (CODS) tests in adolescent basketball players and (2) evaluate positional differences in test performances. Elite, adolescent male basketball players (n = 53; 17.3 ± 1.0 years) completed 6 CODS tests: "Lane Arrow Closeout," "Lane Agility Drill," "Reactive Shuttle Test," "Run-Shuffle-Run," "Compass Drill," and "Modified 505 Test." Players completed 3 trials of each test. All tests demonstrated acceptable reliability (intraclass correlation coefficient: 0.50-0.88; coefficient of variation: 5.1-7.9%). The typical error (TE) calculated for each test was above the smallest worthwhile change, rating the usefulness of all tests as marginal. The principal component factor analysis in all tests resulted in the extraction of one significant component that explained 74% of the total variance across tests. Positional comparisons showed that backcourt (guards) players performed better (small to moderate differences) in all CODS tests compared with frontcourt (forwards and centers) players. All tests were deemed reliable and valid in adolescent basketball players. The "Lane Agility Drill" and "Run-Shuffle-Run" tests seem the most appropriate to quantify changes in CODS possessing the lowest TE, whereas the "Lane Arrow Closeout" and "Lane Agility Drill" tests are the most sensitive in detecting positional differences.

History

Volume

33

Issue

11

Start Page

3162

End Page

3173

Number of Pages

12

eISSN

1533-4287

ISSN

1064-8011

Location

United States

Publisher

Lippincott, Williams & Wilkins

Language

eng

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

University of Nis, Serbia; Institute for Kinesiology Research, Slovenia

Era Eligible

Yes

Journal

Journal of Strength and Conditioning Research