The Experts below are selected from a list of 28575 Experts worldwide ranked by ideXlab platform
Richard W. Bohannon - One of the best experts on this subject based on the ideXlab platform.
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Hand Grip strength normative reference values and equations for individuals 18 to 85 years of age residing in the united states
Journal of Orthopaedic & Sports Physical Therapy, 2018Co-Authors: Yingchih Wang, Richard W. Bohannon, Xiaoyan Li, Bhagwant S Sindhu, Jay KapelluschAbstract:Background Hand-Grip strength is an indicator of overall strength and a predictor of important outcomes. Up-to-date, population-specific reference values for measurements of Grip strength are neede...
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Hand Grip strength normative reference values and equations for individuals 18 to 85 years of age residing in the united states
Journal of Orthopaedic & Sports Physical Therapy, 2018Co-Authors: Yingchih Wang, Richard W. Bohannon, Bhagwant S Sindhu, Jay KapelluschAbstract:Background Hand-Grip strength is an indicator of overall strength and a predictor of important outcomes. Up-to-date, population-specific reference values for measurements of Grip strength are needed to properly interpret strength outcomes. Objectives To provide population-based Grip-strength reference values and equations for US residents 18 to 85 years of age. Methods Hand-Grip data from 1232 participants 18 to 85 years of age were extracted from the database of the 2011 normative phase of the US National Institutes of Health Toolbox project in this cross-sectional study. Descriptive reference values and equations were derived from the data. Results The authors present Grip-strength reference values using summary statistics (mean, standard deviation, and percentile). The mean Grip strength ranged from 49.7 kg for the dominant Hand of men 25 to 29 years of age to 18.7 kg for the nondominant Hand of women 75 to 79 years of age. The researchers also present reference regression equations for the dominant and nondominant sides of men and women. The explanatory variables in the equations are age, height, and weight. Conclusion The normative reference values and equations provided in this study may serve as a guide for interpreting Grip-strength measurements obtained from tested individuals. J Orthop Sports Phys Ther 2018;48(9):685-693. Epub 23 May 2018. doi:10.2519/jospt.2018.7851.
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muscle strength clinical and prognostic value of Hand Grip dynamometry
Current Opinion in Clinical Nutrition and Metabolic Care, 2015Co-Authors: Richard W. BohannonAbstract:Purpose of reviewGrip strength measured by dynamometry is well established as an indicator of muscle status, particularly among older adults. This review was undertaken to provide a synopsis of recent literature addressing the clinical and prognostic value of Hand-Grip dynamometry.Recent findingsNum
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Hand Grip strength age and gender stratified normative data in a population based study
BMC Research Notes, 2011Co-Authors: Nicola Massywestropp, Richard W. Bohannon, Tiffany K Gill, Anne W Taylor, Catherine L HillAbstract:The North West Adelaide Health Study is a representative longitudinal cohort study of people originally aged 18 years and over. The aim of this study was to describe normative data for Hand Grip strength in a community-based Australian population. Secondary aims were to investigate the relationship between body mass index (BMI) and Hand Grip strength, and to compare Australian data with international Hand Grip strength norms. The sample was randomly selected and recruited by telephone interview. Overall, 3 206 (81% of those recruited) participants returned to the clinic during the second stage (2004-2006) which specifically focused on the collection of information relating to musculoskeletal conditions. Following the exclusion of 435 participants who had Hand pain and/or arthritis, 1366 men and 1312 women participants provided Hand Grip strength measurement. The study population was relatively young, with 41.5% under 40 years; and their mean BMI was 28.1 kg/m2 (SD 5.5). Higher Hand Grip strength was weakly related to higher BMI in adults under the age of 30 and over the age of 70, but inversely related to higher BMI between these ages. Australian norms from this sample had amongst the lowest of the Hand Grip strength of the internationally published norms, except those from underweight populations. This population demonstrated higher BMI and lower Grip strength in younger participants than much of the international published, population data. A complete exploration of the relationship between BMI and Hand Grip strength was not fully explored as there were very few participants with BMI in the underweight range. The age and gender Grip strength values are lower in younger adults than those reported in international literature.
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dynamometer measurements of Hand Grip strength predict multiple outcomes
Perceptual and Motor Skills, 2001Co-Authors: Richard W. BohannonAbstract:Hand-Grip strength, which can be measured easily and objectively using a dynamometer, is predictive of multiple outcomes among a variety of subjects. Although the literature is not fully consistent, it tends to support Grip strength as a predictor of postoperative complications, mortality, and functional decline. Hand-Grip dynamometry may merit broader application as a screening procedure.
Shinichi Demura - One of the best experts on this subject based on the ideXlab platform.
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lateral dominance involving Hand Grip strength among soft tennis players swimmers and general people
American Journal of Sports Science and Medicine, 2021Co-Authors: Hiroki Aoki, Shinichi Demura, Kenji Takahashi, Hidenori ShinoharaAbstract:Tennis players frequently use their dominant arm in training and games; hence, the difference between their left and right Hand Grip strength may be significant. This study aimed to examine lateral dominance in terms of Hand Grip strength among soft tennis players, swimmers, and general people. The subjects included 65 soft tennis players, 30 competitive swimmers, and 45 regular people, all of whom were male university students. The three groups did not show significant differences in mean age. The Hand Grip strength of their dominant and nondominant Hands was measured twice. The results of the two-way analysis of variance (ANOVA) (groups × dominant/nondominant Hands) showed a significant interaction. Multiple-comparison tests showed that soft tennis players have stronger dominant-Hand Grip than swimmers and regular people. In addition, the Hand Grip strength was higher in the dominant Hand than in the nondominant Hand in all groups. In addition, the one-way ANOVA showed a significantly larger Hand Grip strength ratio (dominant Hand/nondominant Hand) in soft tennis players than in swimmers and regular people. In conclusion, soft tennis players have stronger dominant-Hand Grip than swimmers and regular people as well as a higher marked lateral dominance.
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gender differences in Hand Grip power in the elderly
Archives of Gerontology and Geriatrics, 2011Co-Authors: Shinichi Demura, Hiroki Aoki, Hiroki SugiuraAbstract:This study aimed to clarify the age-level difference of Hand Grip power in females. The subjects were 15 healthy young females (mean age 21.5 ± 1.4 years, mean height 159.5 ± 2.9 cm, mean mass 52.6 ± 6.1 kg) and 15 elderly females (mean age 65.0 ± 2.6 years, mean height 155.2 ± 5.3 cm, mean mass 56.5 ± 7.3 kg). Peak velocity of the dominant Hand was measured using three different loads of 30, 40 and 50% of maximum voluntary contraction (MVC). The MVC and Hand Grip power were meaningfully greater in the young group than in the elderly group. The peak velocity in all loads showed a meaningful difference between both groups and it was faster in the order of 30, 40 and 50% MVC in both groups. The required time to reach peak velocity at 50% MVC was meaningfully longer in the elderly group, but was significantly shorter at 30% MVC than at 40 and 50% MVC in both groups. In conclusion, the age-level difference in Hand Grip power using relative loads depends more greatly on MVC than velocity in females. The muscle tensile related to Hand Grip movement decreases with age.
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laterality of Hand Grip and elbow flexion power in right Hand dominant individuals
International Journal of Sports Physiology and Performance, 2009Co-Authors: Hiroki Aoki, Shinichi DemuraAbstract:Purpose: This study aimed to compare the laterality, and its gender difference, of Hand Grip and elbow flexion power according to load in right Hand–dominant individuals. Results: The subjects were 15 healthy young males (age 22.1 ± 0.7 y, height 171.3 ± 3.4 cm, mass 64.5 ± 4.1 kg) and 15 healthy young females (age 22.4 ± 1.0 y, height 161.1 ± 3.0 cm, mass 55.4 ± 4.6 kg). Isotonic peak power was measured with 6 different loads ranging from 20% to 70% of maximum voluntary contraction (MVC) for Grip and elbow flexion movements. Results: The peak power was significantly larger in males than in females in both movements (ratio, males:females was 58.1:49.4%). The dominant right Hand had larger peak power in all loads for Hand Grip power (ratio, dominant:nondominant was 83.6:71.1%) and in loads of 20% to 50% MVC for elbow flexion power (88.7:85.7%) in both genders, confirming laterality in both movements. The peak power ratio of the dominant right Hand to the nondomi-nant left Hand was significantly larger in h...
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Characteristics and Lateral Dominance of Hand Grip and Elbow Flexion Powers in Young Male Adults
Journal of Physiological Anthropology, 2008Co-Authors: Hiroki Aoki, Shinichi DemuraAbstract:This study aimed to clarify the characteristics and the lateral dominance of Hand Grip power and elbow flexion power. The subjects were 15 healthy young males (mean age 22.1±0.7 yr, mean height 171.3±3.4 cm, mean mass 64.5±4.1 kg). All subjects were right-Handed. Peak power was measured by both Hands with 6 different loads of 20%–70% of maximum voluntary contraction. The maximum voluntary contraction of Hand Grip movement and elbow flexion movement was significantly larger in the dominant Hand. Peak power of the dominant Hand was larger in all loads in Hand Grip movement and in loads of 20% and 30% of maximum voluntary contraction in elbow flexion movement. In short, lateral dominance was confirmed. Peak power was significantly larger in Hand Grip movement than in elbow flexion movement in both Hands. Peak velocity decreased with increasing loads in both movements, but peak power increased until about 50% of maximum voluntary contraction and then decreased. The peak power ratio of the dominant Hand to the nondominant Hand was significantly larger in Hand Grip movement than in elbow flexion movement in all loads and the peak power ratio in elbow flexion movement was more marked in light loads. In conclusion, both powers showed lateral dominance. Lateral dominance is more marked in Hand Grip power.
Jay Kapellusch - One of the best experts on this subject based on the ideXlab platform.
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Hand Grip strength normative reference values and equations for individuals 18 to 85 years of age residing in the united states
Journal of Orthopaedic & Sports Physical Therapy, 2018Co-Authors: Yingchih Wang, Richard W. Bohannon, Xiaoyan Li, Bhagwant S Sindhu, Jay KapelluschAbstract:Background Hand-Grip strength is an indicator of overall strength and a predictor of important outcomes. Up-to-date, population-specific reference values for measurements of Grip strength are neede...
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Hand Grip strength normative reference values and equations for individuals 18 to 85 years of age residing in the united states
Journal of Orthopaedic & Sports Physical Therapy, 2018Co-Authors: Yingchih Wang, Richard W. Bohannon, Bhagwant S Sindhu, Jay KapelluschAbstract:Background Hand-Grip strength is an indicator of overall strength and a predictor of important outcomes. Up-to-date, population-specific reference values for measurements of Grip strength are needed to properly interpret strength outcomes. Objectives To provide population-based Grip-strength reference values and equations for US residents 18 to 85 years of age. Methods Hand-Grip data from 1232 participants 18 to 85 years of age were extracted from the database of the 2011 normative phase of the US National Institutes of Health Toolbox project in this cross-sectional study. Descriptive reference values and equations were derived from the data. Results The authors present Grip-strength reference values using summary statistics (mean, standard deviation, and percentile). The mean Grip strength ranged from 49.7 kg for the dominant Hand of men 25 to 29 years of age to 18.7 kg for the nondominant Hand of women 75 to 79 years of age. The researchers also present reference regression equations for the dominant and nondominant sides of men and women. The explanatory variables in the equations are age, height, and weight. Conclusion The normative reference values and equations provided in this study may serve as a guide for interpreting Grip-strength measurements obtained from tested individuals. J Orthop Sports Phys Ther 2018;48(9):685-693. Epub 23 May 2018. doi:10.2519/jospt.2018.7851.
Hiroki Aoki - One of the best experts on this subject based on the ideXlab platform.
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lateral dominance involving Hand Grip strength among soft tennis players swimmers and general people
American Journal of Sports Science and Medicine, 2021Co-Authors: Hiroki Aoki, Shinichi Demura, Kenji Takahashi, Hidenori ShinoharaAbstract:Tennis players frequently use their dominant arm in training and games; hence, the difference between their left and right Hand Grip strength may be significant. This study aimed to examine lateral dominance in terms of Hand Grip strength among soft tennis players, swimmers, and general people. The subjects included 65 soft tennis players, 30 competitive swimmers, and 45 regular people, all of whom were male university students. The three groups did not show significant differences in mean age. The Hand Grip strength of their dominant and nondominant Hands was measured twice. The results of the two-way analysis of variance (ANOVA) (groups × dominant/nondominant Hands) showed a significant interaction. Multiple-comparison tests showed that soft tennis players have stronger dominant-Hand Grip than swimmers and regular people. In addition, the Hand Grip strength was higher in the dominant Hand than in the nondominant Hand in all groups. In addition, the one-way ANOVA showed a significantly larger Hand Grip strength ratio (dominant Hand/nondominant Hand) in soft tennis players than in swimmers and regular people. In conclusion, soft tennis players have stronger dominant-Hand Grip than swimmers and regular people as well as a higher marked lateral dominance.
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gender differences in Hand Grip power in the elderly
Archives of Gerontology and Geriatrics, 2011Co-Authors: Shinichi Demura, Hiroki Aoki, Hiroki SugiuraAbstract:This study aimed to clarify the age-level difference of Hand Grip power in females. The subjects were 15 healthy young females (mean age 21.5 ± 1.4 years, mean height 159.5 ± 2.9 cm, mean mass 52.6 ± 6.1 kg) and 15 elderly females (mean age 65.0 ± 2.6 years, mean height 155.2 ± 5.3 cm, mean mass 56.5 ± 7.3 kg). Peak velocity of the dominant Hand was measured using three different loads of 30, 40 and 50% of maximum voluntary contraction (MVC). The MVC and Hand Grip power were meaningfully greater in the young group than in the elderly group. The peak velocity in all loads showed a meaningful difference between both groups and it was faster in the order of 30, 40 and 50% MVC in both groups. The required time to reach peak velocity at 50% MVC was meaningfully longer in the elderly group, but was significantly shorter at 30% MVC than at 40 and 50% MVC in both groups. In conclusion, the age-level difference in Hand Grip power using relative loads depends more greatly on MVC than velocity in females. The muscle tensile related to Hand Grip movement decreases with age.
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laterality of Hand Grip and elbow flexion power in right Hand dominant individuals
International Journal of Sports Physiology and Performance, 2009Co-Authors: Hiroki Aoki, Shinichi DemuraAbstract:Purpose: This study aimed to compare the laterality, and its gender difference, of Hand Grip and elbow flexion power according to load in right Hand–dominant individuals. Results: The subjects were 15 healthy young males (age 22.1 ± 0.7 y, height 171.3 ± 3.4 cm, mass 64.5 ± 4.1 kg) and 15 healthy young females (age 22.4 ± 1.0 y, height 161.1 ± 3.0 cm, mass 55.4 ± 4.6 kg). Isotonic peak power was measured with 6 different loads ranging from 20% to 70% of maximum voluntary contraction (MVC) for Grip and elbow flexion movements. Results: The peak power was significantly larger in males than in females in both movements (ratio, males:females was 58.1:49.4%). The dominant right Hand had larger peak power in all loads for Hand Grip power (ratio, dominant:nondominant was 83.6:71.1%) and in loads of 20% to 50% MVC for elbow flexion power (88.7:85.7%) in both genders, confirming laterality in both movements. The peak power ratio of the dominant right Hand to the nondomi-nant left Hand was significantly larger in h...
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Characteristics and Lateral Dominance of Hand Grip and Elbow Flexion Powers in Young Male Adults
Journal of Physiological Anthropology, 2008Co-Authors: Hiroki Aoki, Shinichi DemuraAbstract:This study aimed to clarify the characteristics and the lateral dominance of Hand Grip power and elbow flexion power. The subjects were 15 healthy young males (mean age 22.1±0.7 yr, mean height 171.3±3.4 cm, mean mass 64.5±4.1 kg). All subjects were right-Handed. Peak power was measured by both Hands with 6 different loads of 20%–70% of maximum voluntary contraction. The maximum voluntary contraction of Hand Grip movement and elbow flexion movement was significantly larger in the dominant Hand. Peak power of the dominant Hand was larger in all loads in Hand Grip movement and in loads of 20% and 30% of maximum voluntary contraction in elbow flexion movement. In short, lateral dominance was confirmed. Peak power was significantly larger in Hand Grip movement than in elbow flexion movement in both Hands. Peak velocity decreased with increasing loads in both movements, but peak power increased until about 50% of maximum voluntary contraction and then decreased. The peak power ratio of the dominant Hand to the nondominant Hand was significantly larger in Hand Grip movement than in elbow flexion movement in all loads and the peak power ratio in elbow flexion movement was more marked in light loads. In conclusion, both powers showed lateral dominance. Lateral dominance is more marked in Hand Grip power.
William K Durfee - One of the best experts on this subject based on the ideXlab platform.
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a video game based Hand Grip system for measuring muscle force in children
Journal of Neuroengineering and Rehabilitation, 2021Co-Authors: Mark Gotthelf, Dewayne Townsend, William K DurfeeAbstract:Background While new therapies are continuously introduced to treat muscular dystrophy, current assessment tests are challenging to quantify, cannot be used in non-ambulatory patients, or can de-motivate pediatric patients. We developed a simple, engaging, upper-limb assessment tool that measures muscle strength and fatigue in children, including children with muscular dystrophy. The device is a bio-feedback Grip sensor that motivates children to complete maximal and fatiguing Grip protocols through a game-based interface. Methods To determine if the new system provided the same maximum Grip force as what is reported in the literature, data was collected from 311 participants without muscle disease (186 M, 125 F), ages 6 to 30, each of whom played the four minute Grip game once. We compared maximum voluntary contraction at the start of the test to normative values reported in the literature using Welch's unequal variances t-tests. In addition, we collected data on a small number of participants with muscle disease to determine if the assessment system could be used by the target patient population. Results Of the 311 participants without muscle disease that started the test, all but one completed the game. The maximum voluntary contraction data, when categorized by age, matched literature values for Hand Grip force within an acceptable range. Grip forced increased with age and differed by gender, and most participants exhibited fatigue during the game, including a degradation in tracking ability as the game progressed. Of the 13 participants with muscle disease, all but one completed the game. Conclusions The study demonstrated the technical feasibility and validity of the new Hand Grip device, and indicated that the device can be used to assess muscle force and fatigue in longitudinal studies of children with muscular dystrophy.
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a video game based Hand Grip system for measuring muscle force in children
Journal of Neuroengineering and Rehabilitation, 2021Co-Authors: Mark Gotthelf, Dewayne Townsend, William K DurfeeAbstract:While new therapies are continuously introduced to treat muscular dystrophy, current assessment tests are challenging to quantify, cannot be used in non-ambulatory patients, or can de-motivate pediatric patients. We developed a simple, engaging, upper-limb assessment tool that measures muscle strength and fatigue in children, including children with muscular dystrophy. The device is a bio-feedback Grip sensor that motivates children to complete maximal and fatiguing Grip protocols through a game-based interface. To determine if the new system provided the same maximum Grip force as what is reported in the literature, data was collected from 311 participants without muscle disease (186 M, 125 F), ages 6 to 30, each of whom played the four minute Grip game once. We compared maximum voluntary contraction at the start of the test to normative values reported in the literature using Welch’s unequal variances t-tests. In addition, we collected data on a small number of participants with muscle disease to determine if the assessment system could be used by the target patient population. Of the 311 participants without muscle disease that started the test, all but one completed the game. The maximum voluntary contraction data, when categorized by age, matched literature values for Hand Grip force within an acceptable range. Grip forced increased with age and differed by gender, and most participants exhibited fatigue during the game, including a degradation in tracking ability as the game progressed. Of the 13 participants with muscle disease, all but one completed the game. The study demonstrated the technical feasibility and validity of the new Hand Grip device, and indicated that the device can be used to assess muscle force and fatigue in longitudinal studies of children with muscular dystrophy.
