Maximum Voluntary Isometric Contraction: Investigation of Reliability and Learning Effect

Meldrum, Dara; Cahalane, Eibhlis; Keogan, Fiona; Hardiman, Orla

doi:10.1080/14660820301176

Cited by 6 publications

(9 citation statements)

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“…Standardization of the procedure (including patient position, instruction, test order and time between tests) and reliability of MVIC testing for grip had previously been established and shown to be highly reliable (20). Subjects rested for 30 s between each test.…”

Section: Methodsmentioning

confidence: 99%

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Quantitative assessment of motor fatigue: Normative values and comparison with prior‐polio patients

Meldrum

Cahalane

Conroy

et al. 2007

Amyotrophic Lateral Sclerosis

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Motor fatigue is a common complaint of polio survivors and has a negative impact on activities of daily living. The aim of this study was to establish a normative database for hand grip strength and fatigue and to investigate differences between prior-polio subjects and normal controls. Static and dynamic hand grip fatigue and maximum voluntary isometric contraction (MVIC) of hand grip were measured in subjects with a prior history of polio (n = 44) and healthy controls (n = 494). A normative database of fatigue was developed using four indices of analysis. Compared with healthy controls, subjects with prior polio had significantly reduced hand grip strength but developed greater hand grip fatigue in only one fatigue index. Quantitative measurement of fatigue in the prior-polio population may be useful in order to detect change over time and to evaluate treatment strategies.

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Section: Methodsmentioning

confidence: 99%

“…This system is an analogue/ digital computerized system utilizing a Jamar dynamometer and has been described in detail elsewhere (20). Subjects underwent four tests of hand grip in the following order:…”

Section: Methodsmentioning

confidence: 99%

Quantitative assessment of motor fatigue: Normative values and comparison with prior‐polio patients

Meldrum

Cahalane

Conroy

et al. 2007

Amyotrophic Lateral Sclerosis

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“…Muscular strength is the force that a muscle or muscle group exerts against resistance in maximal effort. MVIC is a standardized, objective, and sensitive tool for measuring muscle strength 25 . Power is defined as the product of force and distance divided by the change in time.…”

Section: Discussionmentioning

confidence: 99%

Association of muscular fitness with rehospitalization for heart failure with reduced ejection fraction

Ryu

Park

et al. 2020

Clinical Cardiology

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Background Limited information is available regarding the prognostic potential of muscular fitness parameters in heart failure (HF) with reduced ejection fraction (HFrEF). Hypothesis We aimed to investigate the predictive potential of knee extensor muscle strength and power on rehospitalization and evaluate the correlation between exercise capacity and muscular fitness in patients newly diagnosed with HFrEF. Methods Ninety nine patients hospitalized with a new diagnosis of HF were recruited (64 men; aged 58.7 years [standard deviation (SD), 13.2 years]; 32.3% ischemic; ejection fraction, 28% [SD, 8%]). The inclusion criteria were left ventricular ejection fraction <40% and sufficient clinical stability to undergo exercise testing. Aerobic exercise capacity was measured with cardiopulmonary exercise testing. Knee extensor maximal voluntary isometric contraction (MVIC) and muscle power (MP) were measured using the Baltimore therapeutic equipment system. The clinical outcome was HF rehospitalization. Results Over a mean follow‐up period of 1709 ± 502 days, 39 patients were rehospitalized due to HF exacerbation. HF rehospitalization was more probable for patients with diabetes and lower oxygen uptake at peak exercise (peak VO2), knee extensor MVIC, and MP. The Kaplan–Meier survival analysis revealed significantly different cumulative HF rehospitalization rates according to the tertiles of peak VO2 (P = 0.005) and MP (P = 0.002). Multivariable Cox proportional hazard model showed that the lowest tertiles of peak VO2 (hazard ratio (HR), 6.26; 95% confidence interval (CI), 1.93–20.27); and MP (HR, 5.29; 95% CI, 1.05–26.53) were associated with HF rehospitalization. Knee extensor muscle power was an independent predictor for rehospitalization in patients with HFrEF. Conclusion Knee extensor muscle power was an independent predictor for rehospitalization in patients with HFrEF.

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“…The QMA is an analogue/digital-computerized system utilizing a Jamar hand dynamometer and strain gauge. The apparatus and the standardized testing procedure have been described in detail and reliability and normative data reported (Meldrum, Cahalane, Keogan, and Hardiman, 2003;Meldrum et al, 2007a). Each test was completed if the participant had adequate power to generate a resistance against the load cell or dynamometer; otherwise, a score of zero was given.…”

Section: Methodsmentioning

confidence: 99%

“…Muscle strength, using maximum voluntary isometric contraction (MVIC) (peak kg of force), of bilateral hip flexion, knee flexion and extension, ankle dorsiflexion and hand grip were measured using the Quantitative Muscle Assessment (QMA) system (QMA systems: Gainesville, GA; Ross and Krieger, assembly and positioning systems, Minden, Germany; Qbitus Products, West Yorkshire, UK) and using strictly standardized methods (Meldrum, Cahalane, Keogan, and Hardiman, 2003). The QMA is an analogue/digital-computerized system utilizing a Jamar hand dynamometer and strain gauge.…”

Section: Methodsmentioning

confidence: 99%

Assessment of subjective and motor fatigue in Polio survivors, attending a Postpolio clinic, comparison with healthy controls and an exploration of clinical correlates

Murray

Hardiman

Meldrum

2013

Physiotherapy Theory and Practice

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Maximum Voluntary Isometric Contraction: Investigation of Reliability and Learning Effect

Cited by 6 publications

References 0 publications

Quantitative assessment of motor fatigue: Normative values and comparison with prior‐polio patients

Quantitative assessment of motor fatigue: Normative values and comparison with prior‐polio patients

Association of muscular fitness with rehospitalization for heart failure with reduced ejection fraction

Assessment of subjective and motor fatigue in Polio survivors, attending a Postpolio clinic, comparison with healthy controls and an exploration of clinical correlates

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