Differences in hip and knee muscle strength between successful and unsuccessful performances of the single leg sit to stand test from a 20-cm-high box in healthy young adults.
Minoru Daira, Yoshinori Kagaya, Fumiko Kamijo and 3 others
PMID 41036527WHAT IT FOUND
Healthy adults who could stand on one leg from a 20-cm box had stronger knee flexors and extensors than those who failed.
Hip extension strength did not differ between groups, challenging the focus on glutes for this task.
Key findings
01Successful single-leg sit-to-stand from a 20-cm box was associated with significantly greater knee flexion, knee extension, hip flexion, and hip adduction strength compared to unsuccessful performance.
02Hip extension and hip abduction strength showed no significant difference between successful and unsuccessful groups.
03When adjusting for sex, only knee flexion and knee extension strength remained significantly associated with task success; hip flexion and adduction associations were no longer significant.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study included only healthy young adults, so findings may not apply to older adults or clinical populations with pathology. The sample size was relatively small, particularly in the stratified analysis by sex, which may affect the reliability of sex-specific findings. The study did not use three-dimensional motion analysis, so it cannot confirm the specific biomechanical strategies used during the task. Ankle dorsiflexion range of motion was not a primary measurement, though a supplementary analysis found no significant difference between groups.
Declared interests
The authors declared no conflicts of interest relevant to this study.
The easy way to misread this
Do not assume hip extension strength is unimportant for all functional tasks. This study specifically looked at standing from a 20-cm box in healthy young adults. The lack of difference in hip extension strength here does not mean it is irrelevant in other movements or in patients with different pathologies.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →