Objective: To investigate the reliability of knee extensor strength measurements using a supine hand-held dynamometer (HHD) anchoring frame in patients with limited physical activity. Although an HHD is suitable for bedside use, its inter-rater reliability is low because measurements can be influenced by tester strength.
Methods: Maximal knee extensor isometric strength was measured using an HHD anchored to the supine frame. Three trials of three maximal contractions were assessed by two raters.
Results: A total of 33 inpatients who were non-ambulatory due to acute illness participated in the study. The intraclass correlation coefficients were 0.974 (inter-rater) and 0.959 (intra-rater). The minimal detectable changes in intra- and inter-observer measurements were 29.46 N (24.10%) and 36.73 N (29.26%), respectively. The limits of agreement ranged from -19.79% to 24.81% for intra-rater agreement and from -21.45% to 37.07% for inter-rater agreement.
Conclusion: The portable dynamometer anchoring system can measure the isometric strength of the knee extensor reliably in the supine position, and could be used for measurements in patients who have difficulty visiting the laboratory and maintaining a seated posture.
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http://dx.doi.org/10.5535/arm.20056 | DOI Listing |
J Physiol
January 2025
Department of Biomedical Sciences, University of Padova, Padova, Italy.
Short-term unloading experienced following injury or hospitalisation induces muscle atrophy and weakness. The effects of exercise following unloading have been scarcely investigated. We investigated the functional and molecular adaptations to a resistance training (RT) programme following short-term unloading.
View Article and Find Full Text PDFZ Orthop Unfall
January 2025
Institute of Cardiology and Sports Medicine, Department II: Molecular and Cellular Sports Medicine, German Sport University Cologne, Cologne, Germany.
Patients with knee osteoarthritis (KOA) often have impaired muscle function of the weight-bearing muscles, particularly in the knee and hip joints. This can lead to a significant loss of strength and power and may play a role in the perceived instability of the knee joint. The purpose of this study was to compare the maximum isometric strength of the hip abductor and knee extensor muscles between patients with KOA with and without perceived instability.
View Article and Find Full Text PDFJ ISAKOS
January 2025
Laboratory Study of Movement, Instituto de Ortopedia e Traumatologia do Hospital das Clínicas (IOT-HC), Faculdade de Medicina, Universidade de São Paulo (FMSUP), São Paulo, SP; Brazil.
Introduction: Chondromalacia patella (CMP) is characterized by cartilage degeneration, affects young adults, more women (2:1) and is responsible for 75% of knee pain complaints in the active population. The etiology is multifactorial and may be related to extrinsic factors (trauma and burden) and intrinsic factors (patellar malalignment and quadriceps weakness). Isokinetic dynamometry (ID) can aid in the detection of the causal factors of knee pain related to CMP.
View Article and Find Full Text PDFJ Crohns Colitis
January 2025
Professor of Gastroenterology, Translational Medical Sciences, School of Medicine, Faculty of Medicine and Health Sciences, University of Nottingham; NIHR Nottingham Biomedical Research Centre, Nottingham.
Background & Objective: IBD fatigue aetiology is poorly understood. This study quantified body composition and physical function alongside proton magnetic resonance imaging (1H MRI) and spectroscopy (31P MRS) measures of organ structure and function in quiescent Crohn's Disease patients (CD) and healthy volunteers (HV), to identify a physiological basis for IBD fatigue.
Methods: Body composition was determined using DEXA and 1H MRI.
J Diabetes Investig
January 2025
Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan.
Aims/introduction: This study examined the effects of high-intensity interval walking training (IWT) compared to moderate-intensity continuous walking training (CWT) on muscle strength, walking ability, and health-related quality of life (QOL) in people with diabetes accompanied by lower extremity weakness.
Materials And Methods: People with diabetes accompanied by low isometric knee extensor strength using a simple manual dynamometer (n = 50) were screened and randomly divided into 2 groups: CWT (n = 25) and IWT (n = 25). Both groups were instructed by a physical therapist to perform walking training with the goal of 120 min/week over a 5-month period.
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