{"title":"Differences in kinetics and kinematics of sit-to-stand between independent and dependent post-stroke individuals.","authors":"Naoyuki Motojima, Sumiko Yamamoto, Toshiyuki Kohno","doi":"10.1016/j.clinbiomech.2025.106636","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>The sit-to-stand movement is important for the rehabilitation of individuals with poststroke hemiplegia. This study aimed to clarify the variation in kinetic and kinematic characteristics of sit-to-stand movements according to differences in the ability of individuals with poststroke hemiplegia.</p><p><strong>Methods: </strong>Twenty five individuals in the subacute phase of stroke-induced hemiplegia, who needed assistance to practice the sit-to-stand movement (dependent group) and 25 individuals in the subacute phase of stroke-induced hemiplegia who could stand up independently (independent group) were selected for the study. To ensure a fair comparison, the two groups were matched for age, sex, body size, and the paretic side. The sit-to-stand movement was quantified using a three-dimensional motion-analysis system, and the resulting kinetics, kinematics of thorax, pelvis and lower limb, and weight bearing were compared.</p><p><strong>Findings: </strong>The dependent group exhibited significantly reduced hip flexion torque and significantly greater thoracic and pelvic anterior tilt prior to seat-off than the independent group. After seat-off, the dependent group exhibited significantly reduced paretic knee extension torque and significantly greater weight bearing on the nonparetic side, along with significantly elevated hip extension torque on the paretic and non-paretic sides, in comparison to the independent group.</p><p><strong>Interpretation: </strong>The kinetic and kinematic characteristics of the sit-to-stand maneuver before seat-off in the dependent group poststroke differ from those in the independent poststroke individuals, as previously reported. These findings also suggest that weight-bearing on the non- paretic side is key in the sit-to-stand movement of dependent individuals.</p>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":"129 ","pages":"106636"},"PeriodicalIF":1.4000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinical Biomechanics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.clinbiomech.2025.106636","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/5 0:00:00","PubModel":"Epub","JCR":"Q4","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}
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Abstract
Background: The sit-to-stand movement is important for the rehabilitation of individuals with poststroke hemiplegia. This study aimed to clarify the variation in kinetic and kinematic characteristics of sit-to-stand movements according to differences in the ability of individuals with poststroke hemiplegia.
Methods: Twenty five individuals in the subacute phase of stroke-induced hemiplegia, who needed assistance to practice the sit-to-stand movement (dependent group) and 25 individuals in the subacute phase of stroke-induced hemiplegia who could stand up independently (independent group) were selected for the study. To ensure a fair comparison, the two groups were matched for age, sex, body size, and the paretic side. The sit-to-stand movement was quantified using a three-dimensional motion-analysis system, and the resulting kinetics, kinematics of thorax, pelvis and lower limb, and weight bearing were compared.
Findings: The dependent group exhibited significantly reduced hip flexion torque and significantly greater thoracic and pelvic anterior tilt prior to seat-off than the independent group. After seat-off, the dependent group exhibited significantly reduced paretic knee extension torque and significantly greater weight bearing on the nonparetic side, along with significantly elevated hip extension torque on the paretic and non-paretic sides, in comparison to the independent group.
Interpretation: The kinetic and kinematic characteristics of the sit-to-stand maneuver before seat-off in the dependent group poststroke differ from those in the independent poststroke individuals, as previously reported. These findings also suggest that weight-bearing on the non- paretic side is key in the sit-to-stand movement of dependent individuals.
期刊介绍：
Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field.
The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management.
A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly.
Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians.
The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time.
Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.
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