The Experts below are selected from a list of 7317 Experts worldwide ranked by ideXlab platform
Benjamin F Mentiplay - One of the best experts on this subject based on the ideXlab platform.
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assessment of isometric muscle strength and rate of torque development with hand held Dynamometry test retest reliability and relationship with gait velocity after stroke
Journal of Biomechanics, 2018Co-Authors: Yong-hao Pua, Benjamin F Mentiplay, Dawn Tan, Gavin Williams, Brooke Adair, Kelly J Bower, Ross A ClarkAbstract:Abstract Isometric rate of torque development examines how quickly force can be exerted and may resemble everyday task demands more closely than isometric strength. Rate of torque development may provide further insight into the relationship between muscle function and gait following stroke. Aims of this study were to examine the test-retest reliability of hand-held Dynamometry to measure isometric rate of torque development following stroke, to examine associations between strength and rate of torque development, and to compare the relationships of strength and rate of torque development to gait velocity. Sixty-three post-stroke adults participated (60 years, 34 male). Gait velocity was assessed using the fast-paced 10 m walk test. Isometric strength and rate of torque development of seven lower-limb muscle groups were assessed with hand-held Dynamometry. Intraclass correlation coefficients were calculated for reliability and Spearman’s rho correlations were calculated for associations. Regression analyses using partial F-tests were used to compare strength and rate of torque development in their relationship with gait velocity. Good to excellent reliability was shown for strength and rate of torque development (0.82–0.97). Strong associations were found between strength and rate of torque development (0.71–0.94). Despite high correlations between strength and rate of torque development, rate of torque development failed to provide significant value to regression models that already contained strength. Assessment of isometric rate of torque development with hand-held Dynamometry is reliable following stroke, however isometric strength demonstrated greater relationships with gait velocity. Further research should examine the relationship between dynamic measures of muscle strength/torque and gait after stroke.
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assessment of lower limb muscle strength and power using hand held and fixed Dynamometry a reliability and validity study
PLOS ONE, 2015Co-Authors: Benjamin F Mentiplay, Yong-hao Pua, Gavin Williams, Brooke Adair, Kelly J Bower, Luke Perraton, Rebekah Mcgaw, Ross A ClarkAbstract:Introduction Hand-held Dynamometry (HHD) has never previously been used to examine isometric muscle power. Rate of force development (RFD) is often used for muscle power assessment, however no consensus currently exists on the most appropriate method of calculation. The aim of this study was to examine the reliability of different algorithms for RFD calculation and to examine the intra-rater, inter-rater, and inter-device reliability of HHD as well as the concurrent validity of HHD for the assessment of isometric lower limb muscle strength and power. Methods 30 healthy young adults (age: 23±5yrs, male: 15) were assessed on two sessions. Isometric muscle strength and power were measured using peak force and RFD respectively using two HHDs (Lafayette Model-01165 and Hoggan microFET2) and a criterion-reference KinCom dynamometer. Statistical analysis of reliability and validity comprised intraclass correlation coefficients (ICC), Pearson correlations, concordance correlations, standard error of measurement, and minimal detectable change. Results Comparison of RFD methods revealed that a peak 200ms moving window algorithm provided optimal reliability results. Intra-rater, inter-rater, and inter-device reliability analysis of peak force and RFD revealed mostly good to excellent reliability (coefficients ≥ 0.70) for all muscle groups. Concurrent validity analysis showed moderate to excellent relationships between HHD and fixed Dynamometry for the hip and knee (ICCs ≥ 0.70) for both peak force and RFD, with mostly poor to good results shown for the ankle muscles (ICCs = 0.31–0.79). Conclusions Hand-held Dynamometry has good to excellent reliability and validity for most measures of isometric lower limb strength and power in a healthy population, particularly for proximal muscle groups. To aid implementation we have created freely available software to extract these variables from data stored on the Lafayette device. Future research should examine the reliability and validity of these variables in clinical populations.
Ross A Clark - One of the best experts on this subject based on the ideXlab platform.
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assessment of isometric muscle strength and rate of torque development with hand held Dynamometry test retest reliability and relationship with gait velocity after stroke
Journal of Biomechanics, 2018Co-Authors: Yong-hao Pua, Benjamin F Mentiplay, Dawn Tan, Gavin Williams, Brooke Adair, Kelly J Bower, Ross A ClarkAbstract:Abstract Isometric rate of torque development examines how quickly force can be exerted and may resemble everyday task demands more closely than isometric strength. Rate of torque development may provide further insight into the relationship between muscle function and gait following stroke. Aims of this study were to examine the test-retest reliability of hand-held Dynamometry to measure isometric rate of torque development following stroke, to examine associations between strength and rate of torque development, and to compare the relationships of strength and rate of torque development to gait velocity. Sixty-three post-stroke adults participated (60 years, 34 male). Gait velocity was assessed using the fast-paced 10 m walk test. Isometric strength and rate of torque development of seven lower-limb muscle groups were assessed with hand-held Dynamometry. Intraclass correlation coefficients were calculated for reliability and Spearman’s rho correlations were calculated for associations. Regression analyses using partial F-tests were used to compare strength and rate of torque development in their relationship with gait velocity. Good to excellent reliability was shown for strength and rate of torque development (0.82–0.97). Strong associations were found between strength and rate of torque development (0.71–0.94). Despite high correlations between strength and rate of torque development, rate of torque development failed to provide significant value to regression models that already contained strength. Assessment of isometric rate of torque development with hand-held Dynamometry is reliable following stroke, however isometric strength demonstrated greater relationships with gait velocity. Further research should examine the relationship between dynamic measures of muscle strength/torque and gait after stroke.
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assessment of lower limb muscle strength and power using hand held and fixed Dynamometry a reliability and validity study
PLOS ONE, 2015Co-Authors: Benjamin F Mentiplay, Yong-hao Pua, Gavin Williams, Brooke Adair, Kelly J Bower, Luke Perraton, Rebekah Mcgaw, Ross A ClarkAbstract:Introduction Hand-held Dynamometry (HHD) has never previously been used to examine isometric muscle power. Rate of force development (RFD) is often used for muscle power assessment, however no consensus currently exists on the most appropriate method of calculation. The aim of this study was to examine the reliability of different algorithms for RFD calculation and to examine the intra-rater, inter-rater, and inter-device reliability of HHD as well as the concurrent validity of HHD for the assessment of isometric lower limb muscle strength and power. Methods 30 healthy young adults (age: 23±5yrs, male: 15) were assessed on two sessions. Isometric muscle strength and power were measured using peak force and RFD respectively using two HHDs (Lafayette Model-01165 and Hoggan microFET2) and a criterion-reference KinCom dynamometer. Statistical analysis of reliability and validity comprised intraclass correlation coefficients (ICC), Pearson correlations, concordance correlations, standard error of measurement, and minimal detectable change. Results Comparison of RFD methods revealed that a peak 200ms moving window algorithm provided optimal reliability results. Intra-rater, inter-rater, and inter-device reliability analysis of peak force and RFD revealed mostly good to excellent reliability (coefficients ≥ 0.70) for all muscle groups. Concurrent validity analysis showed moderate to excellent relationships between HHD and fixed Dynamometry for the hip and knee (ICCs ≥ 0.70) for both peak force and RFD, with mostly poor to good results shown for the ankle muscles (ICCs = 0.31–0.79). Conclusions Hand-held Dynamometry has good to excellent reliability and validity for most measures of isometric lower limb strength and power in a healthy population, particularly for proximal muscle groups. To aid implementation we have created freely available software to extract these variables from data stored on the Lafayette device. Future research should examine the reliability and validity of these variables in clinical populations.
Trevor A. Dyson-hudson - One of the best experts on this subject based on the ideXlab platform.
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Dynamometry testing in spinal cord injury.
Journal of rehabilitation research and development, 2007Co-Authors: Sue Ann Sisto, Trevor A. Dyson-hudsonAbstract:Persons with a spinal cord injury (SCI) demonstrate strength deficits that can limit their functional ability to perform activities of daily living. For a specific lesion level, performance of functional activities is related to the level of muscle strength. Consequently, in clinical practice, we need reliable measures of muscle strength to determine mobility and self-care ability. Muscle-strength testing is used to document recovery or loss of motor function early in SCI, as well as measure improvements in strength in chronic SCI. We also need such measures for research purposes to determine the efficacy of clinical trials. Several methods are available for testing muscle strength of persons with SCI, such as handheld, handgrip, and isokinetic dynamometers. This article provides an overview of muscle-contraction definitions and testing methodologies and discusses the reliability of these testing methods and Dynamometry devices.
Francine Dumas - One of the best experts on this subject based on the ideXlab platform.
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evaluation of reflex and nonreflex induced muscle resistance to stretch in adults with spinal cord injury using hand held and isokinetic Dynamometry
Physical Therapy, 1998Co-Authors: Anouk Lamontagne, Francine Malouin, Carol L Richards, Francine DumasAbstract:Background and Purpose. In this study, we compared the intertrial reliability of resistive torque measurements obtained with hand-held and isokinetic dynamometers and examined the validity of the hand-held dynamometer for the assessment of spastic hypertonia, defined as reflex- and nonreflex-induced resistance to stretch. Subjects. Nine subjects (mean age=40.6 years) with a chronic (1–5 years) spinal cord injury participated. Methods. The plantar flexors were stretched at 5°/s (low velocity [LV]) and 180°/s (high velocity [HV]) with an isokinetic dynamometer while the evaluator attempted to match these velocities with a hand-held dynamometer. Electromyographic activity of the soleus and tibialis anterior muscles as well as ankle displacements were recorded. Resistive torque and velocity, measured at −5 degrees of dorsiflexion, were averaged (n=4). Results. High intraclass correlation coefficients (ICCs) were found at LV and HV for both the hand-held (ICC=.93 and .84) and isokinetic (ICC=.99 and .93) dynamometers. With the hand-held dynamometer, lower resistive torques were found at LV (0.8 N·m) and HV (1.2 N·m), whereas higher velocities were attained at HV. Conclusion and Discussion. The results indicate that the reproducibility of resistive torques obtained with hand-held Dynamometry compares with that obtained with isokinetic Dynamometry and allows testing of velocities that can be adjusted to the specific level of resistance to stretch. Electromyography confirmed the validity of hand-held Dynamometry for assessing reflex and nonreflex components of SH.
Wendy Pentland - One of the best experts on this subject based on the ideXlab platform.
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Review article : An overview of isokinetic Dynamometry with specific reference to the upper limb
Clinical Rehabilitation, 1993Co-Authors: Roy P. Walmsley, Wendy PentlandAbstract:Isokinetic Dynamometry offers distinct advantages, both clinically and for research, in the evaluation and treatment of muscle performance. The concepts of isokinetic muscle contractions are outlined and the operation and utilization of isokinetic dynamometers explained. The literature examining the reliability and validity of isokinetic protocols is reviewed. Application of this modality is discussed both from the clinical and research perspective. The existing, but limited, literature on isokinetic Dynamometry with the upper limb is reviewed, and recommendations are made as to areas requiring further investigation.
