Background: One-leg sit-to-stand (one-leg STS) test is a new clinical test developed to measure the unilateral lower limb (LE) muscle strength among young adults. This study examined the test-retest reliability and the criterion-concurrent validity of the one-leg STS. Methods: Forty young adults (mean age ± SD, 28.07 ± 5.39 years) participated in the study. The one-leg STS test was administered in two separate assessment sessions to examine test-retest reliability. Two-leg STS test was administered and the performance time was measured. The concentric peak strength of hip flexors/extensors, knee flexors/extensors and ankle dorsi-flexors/plantar-flexors were determined using an isokinetic dynamometer. An intraclass correlation coefficient (ICC) was used to examine the test-retest reliability of one-leg STS test. The criterion validity of the one-leg STS test was evaluated against the performance of the two-leg STS test using an independent sample t test. The concurrent validity of the one-leg STS test was evaluated by investigating the relationships between STS performance time and LE muscle strength using Pearson correlation coefficients. Results: The reliability analysis showed that one-leg STS performance time had excellent test-retest reliability (ICC 3,1 = 0.960, P <.001). Also, the one-leg STS performance time was not different between the first and second sessions, t (39) = 0.672, P =.506. The performance time of the one-leg STS test was significantly greater than the two-leg STS test (t (39) = 20.63, P <.001). The performance time of the one-leg STS test significantly correlated with the concentric peak strength of all LE muscles (P <.05). Conclusions: The one-leg STS test demonstrated excellent reliability and criterion-concurrent validity against the two-leg STS and the LE muscle strength. The one-leg STS test was simple to administer and could be beneficial for the assessment of unilateral LE muscle strength of young adults in clinical settings.
Bibliographical noteThis is the peer reviewed version of the following article: Thongchoomsin, S, Bovonsunthonchai, S, Joseph, L, Chamnongkich, S. Clinimetric properties of the one‐leg sit‐to‐stand test in examining unilateral lower limb muscle strength among young adults. Int J Clin Pract. 2020; 00:e13556, which has been published in final form at DOI: 10.1111/ijcp.13556. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
- muscle strength
- Clinical test
- young adults