Purpose This study aimed to assess knee joint function in post-stroke patients using wireless motion sensors and functional tests. This type of evaluation may be important for improving gait quality. Methods The study included 25 post-stroke patients (age 53.5 ± 8.4 years) and 25 healthy controls (age 51.1 ± 7.7 years). Knee function was assessed using passive range of motion (PROM), active range of motion (AROM) at any speed, maximum speed AROM (FROM), and joint position sense (JPS). Orthyo® motion sensors and a mobile app were used for measurements. The following functional tests have been used: Five Times Sit-to-Stand Test (FTSST) and Timed Up and Go Test (TUG). Results Before rehabilitation, the average values of PROM (p=0.006), AROM (p=0.005), FROM average (p &lt; 0.001) and maximal velocity (p &lt; 0.001), JPS 30º (p = 0.002), JPS 60º (p = 0.002) and JPS 80º (p &lt; 0.001) were significantly worse in the paretic limb than in healthy people. The applied rehabilitation contributed to improving the PROM and AROM and the average and maximum speed of rapid movement in the knee joint. Proprioception (JPS) also improved. Only the average (p &lt; 0.001) and maximum speed (p &lt; 0.001) in the FROM test in the knee joint of the paretic limb after rehabilitation significantly differed from the values in healthy people. The patients' performance (functional tests) improved after rehabilitation (TUG (&lt; 0.001) and FTSST (&lt; 0.001)), but it did not reach the level of healthy people. Conclusions The function of the knee joint in the paretic limb is significantly impaired and requires inclusion in the therapy plan in the early period after stroke.

Agnieszka Wareńczak-Pawlicka

Ewa Lucka

Mateusz Lucki

Przemysław Lisiński

Acta of Bioengineering and Biomechanics

ACTA OF BIOENGINEERING AND BIOMECHANICS 是一个平台，允许在具有技术和医学背景的研究人员之间展示调查结果、交流想法和经验。在 ACTA OF BIOENGINEERING AND BIOMECHANICS 上发表的论文可能涵盖生物力学的广泛主题，包括但不限于TO：组织生物力学，骨科生物力学，生物材料，运动生物力学。

The Acta of Bioengineering and Biomechanics is a platform designed to facilitate the presentation of research findings, exchange of ideas, and sharing of experiences among researchers with technical and medical backgrounds. Papers published in the Acta of Bioengineering and Biomechanics may cover a wide range of topics in biomechanics, including but not limited to tissue biomechanics, orthopedic biomechanics, biomaterials, and sports biomechanics.

《Acta of Bioengineering and Biomechanics》是一个平台，旨在促进具有技术和医学背景的研究人员之间的调查结果展示、思想交流和经验分享。在《Acta of Bioengineering and Biomechanics》上发表的论文涵盖生物力学的广泛主题，包括但不限于组织生物力学、骨科生物力学、生物材料和运动生物力学等领域。

Category	Quartile
医学	4
医学, 生物物理	4
医学, 工程生物医学	4

Importance of the assessment of knee joint function after a stroke

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Category	Quartile
ENGINEERING, BIOMEDICAL	4