Test–retest reliability of EMG and peak torque during repetitive maximum concentric knee extensions

2003 ◽  
Vol 13 (3) ◽  
pp. 281-287 ◽  
Author(s):  
B. Larsson ◽  
S. Karlsson ◽  
M. Eriksson ◽  
B. Gerdle
Keyword(s):  
Peak Torque ◽  
Retest Reliability ◽  
Test Retest Reliability

scholarly journals Test-Retest Reliability of Isokinetic Arm Strength Measurements in Competitive Swimmers

2018 ◽  
Vol 65 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Daniel Collado-Mateo ◽  
Francisco J. Dominguez-Muñoz ◽  
Nuno Batalha ◽  
Jose Parraça ◽  
Pablo Tomas-Carus ◽  
...  
Keyword(s):  
Internal Rotation ◽  
External Rotation ◽  
Peak Torque ◽  
Motor Patterns ◽  
Retest Reliability ◽  
General Terms ◽  
Antagonist Muscles ◽  
Test Retest Reliability ◽  
Rotation Strength ◽  
Competitive Swimmers

Abstract Swimming motor patterns lead internal rotators to grow stronger than antagonist muscles, what may increase the risk of injury in swimmers. Injury prevention often involves the improvement of external rotators strength, as well as the external rotation/internal rotation ratio. The current research aimed to evaluate the test-retest reliability of shoulder concentric rotation strength in competitive swimmers using an isokinetic dynamometer. The study enrolled 35 competitive swimmers aged between 13 and 19 years. Concentric movements were performed including internal and external rotations of the shoulder joint following the instructions of the standardized protocol. The angular velocity of the test was defined at 60º/s. Outcome measures were peak torque (Nm) and work (J), measured in both, the dominant and non-dominant arms. The external rotation/internal rotation ratio was also calculated. Reliability was excellent for peak torque and work. For the external rotation/internal rotation ratio, the ICC oscillated between 0.744 and 0.860 for the work ratio of the non-dominant arm and the peak torque ratio of the dominant arm, respectively. In general terms, better reliability was observed for peak torque compared with work, for external rotation compared with internal rotation, and for the dominant arm compared with the non-dominant one.

scholarly journals Test-Retest Reliability and the Learning Effect on Isokinetic Fatigue in Female Master’s Cyclists

2018 ◽  
Vol 6 (4) ◽  
pp. 1
Author(s):  
Jordan M. Glenn ◽  
Michelle Gray ◽  
Nicole E. Moyen ◽  
Jennifer L. Vincenzo ◽  
Kylie K. Harmon ◽  
...  
Keyword(s):  
Learning Effect ◽  
Female Athletes ◽  
Peak Torque ◽  
Knee Extension ◽  
Intra Class Correlation ◽  
Retest Reliability ◽  
Time To Peak ◽  
Flexion Extension ◽  
And Performance ◽  
Test Retest Reliability

Background: Isokinetic exercise is commonly used as a benchmark for strength and performance. Objective: The purpose of this investigation was to establish isokinetic fatigue test-retest reliability and examine the learning effect when testing without familiarization. Methods: 22 masters-aged [53±5 years), competitive female cyclists completed 3 separate 50-repetition knee flexion/extension tests on a Biodex, separated by one-week with no familiarization. Test-retest reliability [intra-class correlation [ICC]), 95% confidence intervals [CI), technical error of measurement [TEM) were calculated. Results: ICCs between trials exhibited excellent reliability during extension [.93–.97) and flexion [.93–.97) for all variables except time to peak torque [ICC=.35 and.45 for extension and flexion, respectively) and fatigue index [ICC=.47 for flexion). Relative TEM was minimal for extension between trial 1 and trial 2 [0.27%–0.97%) and between trial 2 and trial 3 [0.27%–1.45%) for all variables. Similar results were observed for flexion between trial 1 and trial 2 [0.87%–2.45%) and between trial 2 and trial 3 [0.54%–1.10%). No differences [Wilks Λ>.05) existed between trials, indicating no learning effect associated with the tests. Conclusions: There was strong test-retest reliability in masters-aged, female athletes and no learning effect was associated with the Biodex during a knee extension/flexion fatigue protocol.

Test–Retest Reliability of Biodex System 4 Pro for Isometric Ankle-Eversion and -Inversion Measurement

2013 ◽  
Vol 22 (3) ◽  
pp. 212-215 ◽  
Author(s):  
Gediminas Tankevicius ◽  
Donata Lankaite ◽  
Aleksandras Krisciunas
Keyword(s):  
Outcome Measures ◽  
Intraclass Correlation ◽  
Peak Torque ◽  
University Hospital ◽  
Minimal Detectable Change ◽  
Optimal Position ◽  
Retest Reliability ◽  
Ankle Eversion ◽  
Test Retest Reliability ◽  
And Inversion

Context:The lack of knowledge about isometric ankle testing indicates the need for research in this area.Objective:to assess test–retest reliability and to determine the optimal position for isometric ankle-eversion and -inversion testing.Design:Test–retest reliability study. Isometric ankle eversion and inversion were assessed in 3 different dynamometer foot-plate positions: 0°, 7°, and 14° of inversion. Two maximal repetitions were performed at each angle. Both limbs were tested (40 ankles in total). The test was performed 2 times with a period of 7 d between the tests.Setting:University hospital.Participants:The study was carried out on 20 healthy athletes with no history of ankle sprains.Main Outcome Measures:Reliability was assessed using intraclass correlation coefficient (ICC2,1); minimal detectable change (MDC) was calculated using a 95% confidence interval. Paired t test was used to measure statistically significant changes, and P <.05 was considered statistically significant.Results:Eversion and inversion peak torques showed high ICCs in all 3 angles (ICC values .87–.96, MDC values 3.09–6.81 Nm). Eversion peak torque was the smallest when testing at the 0° angle and gradually increased, reaching maximum values at 14° angle. The increase of eversion peak torque was statistically significant at 7 ° and 14° of inversion. Inversion peak torque showed an opposite pattern—it was the smallest when measured at the 14° angle and increased at the other 2 angles; statistically significant changes were seen only between measures taken at 0° and 14°.Conclusions:Isometric eversion and inversion testing using the Biodex 4 Pro system is a reliable method. The authors suggest that the angle of 7° of inversion is the best for isometric eversion and inversion testing.

Test-Retest Reliability and Validity of Isometric Knee-Flexion and -Extension Measurement Using 3 Methods of Assessing Muscle Strength

2013 ◽  
Vol 22 (1) ◽  
Author(s):  
Jenny Toonstra ◽  
Carl G. Mattacola
Keyword(s):  
Repeated Measures ◽  
Effective Means ◽  
Reliability And Validity ◽  
Cost Effective ◽  
Peak Torque ◽  
Ease Of Use ◽  
Assessment Tools ◽  
Retest Reliability ◽  
Rehabilitation Programs ◽  
Test Retest Reliability

Context: Physicians and clinicians need portable, efficient, and cost-effective assessment tools to determine the effectiveness of rehabilitation programs after knee injury. Progress in rehabilitation should be evaluated using valid and reliable measurement methods. Objective: To examine the test-retest reliability of portable fixed dynamometry (PFD), handheld dynamometry (HHD), and isokinetic dynamometry (IKD). In addition, the authors sought to examine the validity of PFD and HHD by comparing differences in peak torque of the knee flexors and extensors to that of the "gold standard" IKD. Design: Repeated measures. Participants: 16 healthy subjects (age 29.3 ± 7.2 y, height 167.4 ± 8.04 cm, mass 73.7 ± 20.0 kg). Main Outcome Measures: The dependent variables were trial (trial 1, trial 2) and instrument (IKD, PFD, and HHD). Results: Test-retest reliability was high for both PFD and IKD. However, fair to poor reliability was found for HHD. There were no differences in peak torque (Nm) between IKD and PFD. However, significant differences in peak torque were observed between IKD and HHD and between PFD and HHD. Conclusions: PFD provides reliable measures of strength and also demonstrates similar output measures as IKD. Its portability, ease of use, and cost provide clinicians an effective means of measuring strength.

Measuring “Language Access Profiles” in Deaf and Hard-of-Hearing Children With the DHH Language Exposure Assessment Tool

2020 ◽  
pp. 1-25
Author(s):  
Matthew L. Hall ◽  
Stephanie De Anda
Keyword(s):  
Cluster Analysis ◽  
Exposure Assessment ◽  
Hard Of Hearing ◽  
Assessment Tool ◽  
Communication Mode ◽  
Developmental Potential ◽  
Language Access ◽  
Retest Reliability ◽  
Language Exposure ◽  
Test Retest Reliability

Purpose The purposes of this study were (a) to introduce “language access profiles” as a viable alternative construct to “communication mode” for describing experience with language input during early childhood for deaf and hard-of-hearing (DHH) children; (b) to describe the development of a new tool for measuring DHH children's language access profiles during infancy and toddlerhood; and (c) to evaluate the novelty, reliability, and validity of this tool. Method We adapted an existing retrospective parent report measure of early language experience (the Language Exposure Assessment Tool) to make it suitable for use with DHH populations. We administered the adapted instrument (DHH Language Exposure Assessment Tool [D-LEAT]) to the caregivers of 105 DHH children aged 12 years and younger. To measure convergent validity, we also administered another novel instrument: the Language Access Profile Tool. To measure test–retest reliability, half of the participants were interviewed again after 1 month. We identified groups of children with similar language access profiles by using hierarchical cluster analysis. Results The D-LEAT revealed DHH children's diverse experiences with access to language during infancy and toddlerhood. Cluster analysis groupings were markedly different from those derived from more traditional grouping rules (e.g., communication modes). Test–retest reliability was good, especially for the same-interviewer condition. Content, convergent, and face validity were strong. Conclusions To optimize DHH children's developmental potential, stakeholders who work at the individual and population levels would benefit from replacing communication mode with language access profiles. The D-LEAT is the first tool that aims to measure this novel construct. Despite limitations that future work aims to address, the present results demonstrate that the D-LEAT represents progress over the status quo.

Visual-Neural Correlate of Speechreading Ability in Normal-Hearing Adults

1982 ◽  
Vol 25 (4) ◽  
pp. 521-527 ◽  
Author(s):  
David C. Shepherd
Keyword(s):  
Normal Hearing ◽  
Wave Form ◽  
Firing Time ◽  
Neural Firing ◽  
Neural Correlate ◽  
Retest Reliability ◽  
Repeated Word ◽  
Negative Peak ◽  
The Stability ◽  
Test Retest Reliability

In 1977, Shepherd and colleagues reported significant correlations (–.90, –.91) between speechreading scores and the latency of a selected negative peak (VN 130 measure) on the averaged visual electroencephalic wave form. The primary purpose of this current study was to examine the stability, or repeatability, of this relation between these cognitive and neurophysiologic measures over a period of several months and thus support its test-retest reliability. Repeated speechreading word and sentence scores were gathered during three test-retest sessions from each of 20 normal-hearing adults. An average of 56 days occurred from the end of one to the beginning of another speechreading sessions. During each of four other test-retest sessions, averaged visual electroencephalic responses (AVER s ) were evoked from each subject. An average of 49 clays intervened between AVER sessions. Product-moment correlations computed among repeated word scores and VN l30 measures ranged from –.61 to –.89. Based on these findings, it was concluded that the VN l30 measure of visual neural firing time is a reliable correlate of speech-reading in normal-hearing adults.

Test-Retest Reliability of a Self-Report Questionnaire for DSM-IV and ICD-10 Personality Disorders

2000 ◽  
Vol 16 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Hans Ottosson ◽  
Martin Grann ◽  
Gunnar Kullgren
Keyword(s):  
Personality Disorder ◽  
Anxiety Disorders ◽  
Personality Disorders ◽  
Clinical Sample ◽  
Self Report ◽  
Anxiety State ◽  
Short Term ◽  
Retest Reliability ◽  
Axis I ◽  
Test Retest Reliability

Summary: Short-term stability or test-retest reliability of self-reported personality traits is likely to be biased if the respondent is affected by a depressive or anxiety state. However, in some studies, DSM-oriented self-reported instruments have proved to be reasonably stable in the short term, regardless of co-occurring depressive or anxiety disorders. In the present study, we examined the short-term test-retest reliability of a new self-report questionnaire for personality disorder diagnosis (DIP-Q) on a clinical sample of 30 individuals, having either a depressive, an anxiety, or no axis-I disorder. Test-retest scorings from subjects with depressive disorders were mostly unstable, with a significant change in fulfilled criteria between entry and retest for three out of ten personality disorders: borderline, avoidant and obsessive-compulsive personality disorder. Scorings from subjects with anxiety disorders were unstable only for cluster C and dependent personality disorder items. In the absence of co-morbid depressive or anxiety disorders, mean dimensional scores of DIP-Q showed no significant differences between entry and retest. Overall, the effect from state on trait scorings was moderate, and it is concluded that test-retest reliability for DIP-Q is acceptable.

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