Fluctuation in grip and pinch strength among normal subjects

Young, V. Leroy; Pin, Paul G.; Kraemer, Bruce A.; Gould, R. Blair; Nemergut, Laurie; Pellowski, M. W.

doi:10.1016/0363-5023(89)90071-3

Cited by 71 publications

(26 citation statements)

References 4 publications

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“…The variability seen in the repeat testing component of our study compared favorably with previous studies. Young et al, 15 using the hydraulic Jamar dynamometer, repeat tested 95 healthy adults, reporting within-subject variability between 19.2% to 23.7%, and Lagerstrom and Nordgren 11 reported the within-subject variability of the Grippit dynamometer to be within 1% to 5%, and interrater repeatability to be 12.9% (Ϯ5.1%). In this study, the Grippit showed better reliability than did the Jamar for healthy subjects, but it showed greater variability between volunteers with arthritis.…”

Section: Discussionmentioning

confidence: 96%

Measuring grip strength in normal adults: Reference ranges and a comparison of electronic and hydraulic instruments

Massy‐Westropp¹,

Rankin²,

Ahern

et al. 2004

The Journal of Hand Surgery

194

137

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Section: Discussionmentioning

confidence: 96%

Measuring grip strength in normal adults: Reference ranges and a comparison of electronic and hydraulic instruments

Massy‐Westropp¹,

Rankin²,

Ahern

et al. 2004

The Journal of Hand Surgery

194

137

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“…This may be another factor accounting for the differences between the British and American norms. 30 Some limitations were noted while completing this study. Volunteers were not selected randomly and, although attempts were made to select a cross-section of participants, it is not known if the sample represents the United Kingdom as a whole.…”

Section: Discussionmentioning

confidence: 97%

Power and Pinch Grip Strength Recorded Using the Hand-Held Jamar® Dynamometer and B+L Hydraulic Pinch Gauge: British Normative Data for Adults

Gilbertson¹,

Barber-Lomax²

1994

British Journal of Occupational Therapy

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dy was to establish British normative data fOr adults aged 15 to 92 years, using dynamometer was used to measure power grip and a B+L hydraulic and lateral grips. A sample of 130 men and 130 women from the using standardised positioning and instructions. an female grip strength in all hand grips. In of 15 and 49 years and declined gradually not decline noticeably until after the age lne in male tripod and lateral pinch grips wed no line related to age.

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“…Lebel et al (1996Lebel et al ( , 1998 reported decreased handgrip strength with increasing hair mercury levels in women. Considering that grip strength can dier for the same individual between dierent trials (Young et al 1989), the one time evaluation done in the present study may account for a non-representative state of the actual individual grip strength. This could explain the dierence between the results of the present and previous studies, where the average of two trials for each participant was the outcome measure.…”

Section: Discussionmentioning

confidence: 99%

Methylmercury exposure affects motor performance of a riverine population of the Tapajós river, Brazilian Amazon

Dolbec¹,

Mergler²,

Passos

et al. 2000

International Archives of Occupational and Environmental Health

187

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Gold mining and deforestation in the Brazilian Amazon are increasing mercury pollution of the extensive water system, exposing riverine populations to organic mercury through fish-eating. The aim of the present study was to evaluate the effect of such exposure on motor performance. This cross-sectional study was carried out in May 1996, in a village located on the banks of the Tapajós river in the Amazonian Basin, Brazil. Information concerning sociodemographics, health, smoking habits, alcohol drinking, dietary habits and work history were collected using an interview-administered questionnaire. Mercury concentrations were measured by cold vapor atomic absorption in blood and hair of each participant, of whom those aged between 15 and 79 years were assessed for motor performance (n = 84). Psychomotor performance was evaluated using the Santa Ana manual dexterity test, the Grooved Pegboard Fine motor test and the fingertapping motor speed test. Motor strength was measured by dynamometry for grip and pinch strength. Following the exclusion of 16 persons for previous head injury, working with mercury in the goldmining sites, or for diabetes, the relationship between performance and bioindicators of mercury was examined using multivariate statistical analyses, taking into account covariables. All participants in the study reported eating fish, which comprised 61.8% of the total meals eaten during the preceding week. The median hair total mercury concentration was 9 microg/g. Organic mercury accounted for 94.4 = 1.9% of the total mercury levels. Multivariate analysis of variance indicated that hair mercury was inversely associated with overall performance on the psychomotor tests, while a tendency was observed with blood mercury. Semipartial regression analyses showed that hair total mercury accounted for 8% to 16% of the variance of psychomotor performance. Neither hair nor blood total mercury was associated with the results of the strength tests in women and men. Although dose-effect relationships were observed in this cross-sectional study, they may reflect higher exposure levels in the past. The findings of this study demonstrated neurobehavioral manifestations of subtle neurotoxic effects on motor functions, associated with low-level methylmercury exposure.

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Fluctuation in grip and pinch strength among normal subjects

Cited by 71 publications

References 4 publications

Measuring grip strength in normal adults: Reference ranges and a comparison of electronic and hydraulic instruments

Measuring grip strength in normal adults: Reference ranges and a comparison of electronic and hydraulic instruments

Power and Pinch Grip Strength Recorded Using the Hand-Held Jamar® Dynamometer and B+L Hydraulic Pinch Gauge: British Normative Data for Adults

Methylmercury exposure affects motor performance of a riverine population of the Tapajós river, Brazilian Amazon

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