Abstract
Physical fatigue has been identified as a risk factor associated with the onset of occupational injury. Muscular fatigue developed from repetitive hand-gripping tasks is of particular concern. This study examined the use of a maximal, repetitive, static power grip test of strength-endurance in detecting differences in exertions between workers with uninjured and injured hands, and workers who were asked to provide insincere exertions. The main dependent variable of interest was power grip muscular force measured with a force strain gauge. Group data showed that the power grip protocol, used in this study, provided a valid and reliable estimate of wrist-hand strength-endurance. Force fatigue curves showed both linear and curvilinear effects among the study groups. An endurance index based on force decrement during repetitive power grip was shown to differentiate between uninjured, injured, and insincere groups.
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References
Isernhagen SJ.Work injury management and prevention. Aspen Publishers, Maryland, 1988, pp. 73, 81–83.
National Institute of Occupational Safety and Health. Health Hazard Evaluation Report (HETA 89-250-2046). NIOSH, Cincinnati, Ohio, 1990, p. 16.
National Safety Council. Control of Cumulative Trauma Disorders (ANSI-3,365 Draft Standard). National Safety Council, Itasca, Illinois, 1993, pp. 3–1, and 5–3.
State of California. Prevention of Cumulative Trauma Disorders (General Safety Orders, article 106, section 5110; proposed state standard, title 8, chapter 4). Sacramento, California: 1993, pp. 15–16.
American Medical Association.Guides to the evaluation of permanent impairment (4th Ed.). AMA, Chicago, IL, AMA, 1993.
Mathiowetz V, Kashman N, Volland G, Weber K, Dowe M, Rogers S. Grip and pinch strength: Normative data for adults.Arch Phys Med Rehab 1985; 66: 69–74.
Chaffin D. Ergonomics guide for the assessment of human strength.Am Ind Hyg Assoc J 1975; 36: 505–510.
Chengalur SN, Smith GA, Nelson RC, Sadoff AM. Assessing sincerity of effort in maximal grip strength tests. Part II.Am J Phys Med Rehab 1990; 69: 148–163.
Gilbert JC, Knowlton RG. Simple methods to determine sincerity of effort during a maximal isometric test of grip strength.Am J Phys Med 1983; 62: 135–144.
Neiburgh B, Marion R. Detecting sincerity of effort when measuring grip strength.Am J Phys Med 1987; 66: 16–24.
Robertson LD, Mullinax CM, Brodowicz GR, Miller RA, Swafford AR. The relationship between two power-grip testing devices and their utility in physical capacity evaluations.J Hand Ther 1993; 6: 194–201.
Robinson ME, Geisser ME, Hanson CS, O'Connor PD. Detecting submaximal efforts in grip strength testing with the coefficient of variation.J Occup Rehab 1993; 3: 45–50.
Smith G, Nelson RC, Sadoff SJ, Sadoff AM. Assessing sincerity of effort in maximal grip strength tests.Am J Phys Med Rehab 1989; 68: 73–80.
Stokes HM. The seriously injured hand—weakness of grip.J Occup Med 1983; 25: 683–684.
Kroll W. Analysis of local muscular fatigue patterns.Res Quart Exercise Sport 1981; 52: 523–539.
Byrd R, Jenness ME. Effect of maximal grip strength and initial strength on contraction time and on areas under force-time curves during isometric contractions.Ergonomics 1982; 25: 387–392.
Tuttle WW, Janney CD, Thompson CW. Relation of maximum grip strength to grip strength endurance.J Appl Physiol 1950; 2: 663–670.
Department of Labor.Dictionary of occupational titles (4th Ed.). U.S. Department of Labor, Employment, and Training Administration, Washington, DC, 1986.
Fess EE, Moran C.Clinical assessment and recommendations. American Society of Hand Therapists, Garner, NC, 1981.
Clarke HH, Shay CT, Mathews DK. Strength decrement index: A new test of muscular fatigue.Arch Phys Med Rehab 1955; 36: 376.
Hildreth DH, Breidenbach WC, Lister GD, Hodges AD. Detection of submaximal effort by use of the rapid exchange grip.J Hand Surg 1989; 14A: 742–745.
Laubach LL. Comparative muscular strength of men and women: A review of the literature.Aviat Space Environ Med 1976; 47: 534–542.
Kroll W. Isometric fatigue curves under varied intertrial recuperation periods.Res Quart 1968; 39: 106–115.
Kroll W. Isometric strength fatigue patterns in female subjects.Res Quart 1971; 42: 286–298.
Smith LE, Edwards DK. Prediction of muscular endurance (work performance) from individual differences in initial and post training increments in static strength.Hum Factors 1968; 10: 345–350.
Kroemer KHE, Marras WS. Toward an objective assessment of the maximal voluntary contraction component in routine muscle strength measurements.Eur J Appl Physiol 1980; 45: 1–9.
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Robertson, L.D., Mullinax, C.M., Brodowicz, G.R. et al. Muscular fatigue patterning in power grip assessment. J Occup Rehab 6, 71–85 (1996). https://doi.org/10.1007/BF02110395
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DOI: https://doi.org/10.1007/BF02110395