determining-electromyographic-fatigue-threshold-following-single

Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test

Theoretically, the electromyographic (EMG) fatigue threshold is the exercise intensity an individual can maintain indefinitely without the need to recruit ...

video-movement-analysis-using-smartphones-vimas-a-pilot-study

Video Movement Analysis Using Smartphones (ViMAS): A Pilot Study

The use of smartphones in clinical practice is steadily increasing with the availability of low cost/freely available &#34;apps&#34; that could be used to ...

Wayne State University

The purpose of this study was to determine the intersession reliability of the electromyographic fatigue threshold (EMGFT ) for cycle ergometry.

Test-retest reliability of the electromyographic fatigue threshold for cycle ergometry.

Performing gait analysis in a clinical setting can often be challenging due to time, cost and the availability of sophisticated three-dimensional (3D) gait analysis systems. This study has developed and tested a portable wireless gait assessment tool (wi-GAT) to address these challenges.

Development and validation of a low-cost, portable and wireless gait assessment tool.

Strength changes in lower limb muscles following robot assisted gait training (RAGT) in subjects with incomplete spinal cord injury (ISCI) has not been quantified using objective outcome measures.

Isometric hip and knee torque measurements as an outcome measure in robot assisted gait training.

Two different protocols for estimating the electromyographic fatigue threshold (EMGFT) have been proposed in the literature. These protocols are distinguished by the number of visits required to determine the EMGFT. The purpose of this study, therefore, was to statistically compare the estimated EMGFT from the single-visit incremental test and the multiple-visit constant workload tests for single-leg knee-extensor exercise. Seven healthy college-aged men [mean ± SEM; age = 25.0 ± 0.7 years] performed the incremental test and on separate occasions also performed 4 constant workload tests to voluntary exhaustion. The EMG amplitude was recorded from the rectus femoris muscle during all the testing sessions. For the single-visit test, the EMG amplitude vs. time relationship for each power output was examined using linear regression. For the multiple-visit tests, the EMG amplitude vs. time relationship was calculated for each constant power output. Thereafter, the power outputs were plotted as a function of the slope coefficient for the EMG amplitude vs. time relationships, and linear regression was performed. The EMGFT was defined as the intersection of the regression line with the y-intercept of the power output vs. slope coefficient plot. The results indicated that the estimated EMGFT from the single-visit test was significantly (p = 0.012) lower than the estimate from the multiple-visit tests. Because this test is performed during a single visit and concludes within 20 minutes, it may also have application in clinical rehabilitation settings and not merely for an athletic population.

A single electromyographic testing point is valid to monitor neuromuscular fatigue during continuous exercise.

Introduction: The purpose of this investigation was to determine the reproducibility of the log-transformed model for EMG amplitude during incremental single leg knee extensor exercise. Methods: Eight healthy college-aged men performed 3 incremental tests on separate occasions on the knee-extensor ergometer. EMG amplitude was analyzed for each participant on each occasion for the rectus femoris and vastus medialis muscles at 4 different exercise power outputs (30%, 50%, 70%, and 90%) corresponding to each participant's maximal power output. Intraclass correlation coefficients (ICC) were determined for the slope and y-intercept terms derived from the log-transformed EMG amplitude-power output relationship for each muscle. Results: The ICC values for the rectus femoris (slope = 0.779; y-intercept = 0.787) and vastus medialis (slope = 0.756; y-intercept = 0.763) muscles were high. Discussion: The log-transformed EMG amplitude-power output relationship is a reliable index for measuring motor unit activation. This article is protected by copyright. All rights reserved.

Reliability of the Log-Transformed EMG Amplitude-Power Output Relationship for Incremental Knee-Extensor Ergometry.

Videogaming platforms such as the Microsoft (Redmond, WA) Kinect(®) are increasingly being used in rehabilitation to improve balance performance and mobility. These gaming platforms do not have built-in clinical measures that offer clinically meaningful data. We have now developed software that will enable the Kinect sensor to assess a patient's balance using an interactive functional reach test (I-FRT). The aim of the study was to test the concurrent validity of the I-FRT and to establish the feasibility of implementing the I-FRT in a clinical setting.

Validity of an Interactive Functional Reach Test.

The wireless gait assessment tool (Wi-GAT) measures have been shown to have good to excellent concurrent validity with preferred walking speeds, however, the validity of the Wi-GAT measures at slow and fast walking speeds is unknown.

Validity of a Wireless Gait Analysis Tool (Wi-GAT) in assessing spatio-temporal gait parameters at slow, preferred and fast walking speeds.

Morse, JJ, Pallaska, G, Pierce, PR, Fields, TM, Galen, SS, and Malek, MH. Acute low-dose caffeine supplementation increases electromyographic fatigue threshold in healthy men. J Strength Cond Res 30(11): 3236-3241, 2016-The purpose of this study is to determine whether consumption of a single low-dose caffeine drink will delay the onset of the electromyographic fatigue threshold (EMGFT) in the superficial quadriceps femoris muscles. We hypothesize that the EMGFT values for the caffeine condition will be significantly higher than the EMGFT values for the placebo condition. On separate occasions, 10 physically active men performed incremental single-leg knee-extensor ergometry 1 hour after caffeine (200 mg) or placebo consumption. The EMGFT was determined for each participant for both conditions. The results indicated a significant increase for maximal power output (16%; p = 0.004) and EMGFT (45%; p = 0.004) in the caffeine condition compared with placebo. These findings suggest that acute low-dose caffeine supplementation delays neuromuscular fatigue in the quadriceps femoris muscles.

Acute Low-Dose Caffeine Supplementation Increases Electromyographic Fatigue Threshold in Healthy Men.

Letter to the editor regarding "Clinical effectiveness and safety of powered exoskeleton-assisted walking in patients with spinal cord injury: systematic review with meta-analysis".

ArticleTotal : 2	Year
Publication title Cited by 17	2015
Publication title Cited by 21	2017

Article	Year
Test-retest reliability of the electromyographic fatigue threshold for cycle ergometry. Muscle & nerve\| PubMed ID: 26385259	2016
Development and validation of a low-cost, portable and wireless gait assessment tool. Medical engineering & physics\| PubMed ID: 24345892	2014
Isometric hip and knee torque measurements as an outcome measure in robot assisted gait training. NeuroRehabilitation\| PubMed ID: 24419018	2014
A single electromyographic testing point is valid to monitor neuromuscular fatigue during continuous exercise. Journal of strength and conditioning research / National Strength & Conditioning Association\| PubMed ID: 25029004	2014
Reliability of the Log-Transformed EMG Amplitude-Power Output Relationship for Incremental Knee-Extensor Ergometry. Muscle & nerve\| PubMed ID: 25557306	2014
Validity of an Interactive Functional Reach Test. Games for health journal\| PubMed ID: 26182215	2015
Validity of a Wireless Gait Analysis Tool (Wi-GAT) in assessing spatio-temporal gait parameters at slow, preferred and fast walking speeds. Technology and health care : official journal of the European Society for Engineering and Medicine\| PubMed ID: 27392831	2016
Acute Low-Dose Caffeine Supplementation Increases Electromyographic Fatigue Threshold in Healthy Men. Journal of strength and conditioning research\| PubMed ID: 27776081	2016
Letter to the editor regarding "Clinical effectiveness and safety of powered exoskeleton-assisted walking in patients with spinal cord injury: systematic review with meta-analysis". Medical devices (Auckland, N.Z.)\| PubMed ID: 27942236	2016

Sujay S. Galen

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