Context: Intrasession reliabilities of isometric knee extension kinetics via portable strain gauge have been reported across several knee joint angles and constraints. However, intersession variabilities, which are more valuable, have yet to be determined. Therefore, we aimed to quantify the intersession variability of knee extension kinetics over 3 testing sessions using an affordable and portable strain gauge.
Design: Participants performed maximum voluntary isometric contractions of the knee extensors over 3 sessions.
Methods: Eleven (6 men and 5 women; 31 [6.4] y) volunteers performed maximum voluntary isometric contractions in constrained (isokinetic setup with thigh and chest straps) and unconstrained (treatment plinth) conditions. Peak force (PF), peak rate of force development, rate of force development (RFD), and impulse (IMP) from 20% to 80% of PF were assessed. Means, SDs, percentage changes, minimal detectable changes, coefficients of variation (CV), and intraclass correlation coefficients (ICC) were calculated and reported.
Results: PF had the lowest intersession variability regardless of condition (CV = 5.5%-13.8%, ICC = .67-.93). However, variability of peak rate of force development (CV [range] = 12.2%-24.7%, ICC = .50-.78), RFD (CV = 10.0%-26.8%, ICC = .48-.84), and IMP (CV = 15.2%-35.4%, ICC = .44-.88) was moderate at best. The constrained condition (CV [SD] = 14.1% [4.8%], ICC = .74 [.08]) had lower variability compared with the plinth (CV = 19.8% [7.9%], ICC = .68 [.15]). Variability improved from sessions 1 to 2 (CV = 20.4% [7.7%], ICC = .64 [.14]) and to sessions 2 to 3 (CV = 15.3% [6.4%], ICC = .76 [.10]).
Conclusions: PF can be assessed regardless of setup. However, RFD and IMP changes across sessions should be approached with caution. Backrests and thigh straps improve RFD and IMP variability, and at least 1 familiarization session should be provided before relying on knee-extensor kinetics while utilizing a portable strain gauge.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1123/jsr.2022-0152 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A New Method to Measure Ocular Surface Sensitivity: Repeatability and Reproducibility of the Liquid Jet Esthesiometer.
Eye Contact Lens
November 2024
School of Optometry and Vision Science (K.E., F.S., B.T., J.C., B.G.), University of New South Wales, Sydney, Australia; and Department of Optics and Optometry and Vision Sciences (C.T.-E.), University of Valencia, Valencia, Spain.
Objectives: To assess the reliability of the liquid jet esthesiometer (LJA) for measurement of corneal sensitivity.
Methods: Two separate studies were conducted to assess intrasession repeatability (study 1) and intersession reproducibility (study 2) of corneal sensitivity measured using the LJA. Thirty participants (13 female and 17 male participants, age 23±6 years) participated in study 1 and another 30 (18 female and 12 male participants, 35±10 years) participated in study 2.
Systematic review of experimental paradigms and deep neural networks for electroencephalography-based cognitive workload detection.
Prog Biomed Eng (Bristol)
October 2024
Neural Engineering Lab, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Assam 781039, India.
This article summarizes a systematic literature review of deep neural network-based cognitive workload (CWL) estimation from electroencephalographic (EEG) signals. The focus of this article can be delineated into two main elements: first is the identification of experimental paradigms prevalently employed for CWL induction, and second, is an inquiry about the data structure and input formulations commonly utilized in deep neural networks (DNN)-based CWL detection. The survey revealed several experimental paradigms that can reliably induce either graded levels of CWL or a desired cognitive state due to sustained induction of CWL.
View Article and Find Full Text PDFTest-retest variability of mesopic microperimetry-associated parameters in patients with retinitis pigmentosa: REPEAT Study Report No. 2.
Acta Ophthalmol
November 2024
Department of Ophthalmology, Leiden University Medical Center, Leiden, The Netherlands.
Purpose: Understanding test-retest variability (TRV) of mesopic microperimetry is critical for defining meaningful treatment effects in retinitis pigmentosa (RP) trials. This study uniquely evaluates intra- and intervisit TRV and coefficients of repeatability (CoRs) for microperimetry parameters in RP patients with varying best-corrected visual acuity (BCVA) levels.
Methods: In this single-centre prospective cohort study, RP patients were assessed on two visits, 14.
Minimum perceptual time (MPT). Repeatability and reproducibility of variables applied to "sports vision".
Graefes Arch Clin Exp Ophthalmol
November 2024
Department of Surgery Ophthalmology Area, University of Seville, 41009, Seville, Spain.
Purpose: "Minimum Perceptual Time" (MPT) is the ability to take the most visual information in the least time. The purpose of the study was to assess intraobserver and interobserver repeatability of a MPT measurement method by using COI-SV software and to analyze the possible influence of age and sex.
Methods: MPT was measured in 79 participants by using COI-SV software.
Evaluating the reproducibility and validity of maximal mouth opening measurement techniques.
J Stomatol Oral Maxillofac Surg
October 2024
Oral and Maxillofacial Surgery, University Hospitals Leuven and OMFS-IMPATH research group, Department of Imaging & Pathology, Faculty of Medicine, KU Leuven, Leuven, Belgium.
Objectives: A limitation of the maximal mouth opening (MMO) is a frequent complication of oral (cancer) surgery. The measurement between the right central incisors is considered the golden standard for assessing MMO, although it has been noted to overestimate MMO in edentulous patients. This study aims to evaluate the reproducibility and validity of four MMO techniques and to determine the extent to which they are dependent on the remaining dentition.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!