The Effects of Wrist Splints on When Females Reach the Peak Grip Strength under Different Wrist and Forearm Positions

在不同前臂與手腕姿勢下護腕對女性達最大力量所需時間之影響

10.29977/JCIIE.200609.0008

石裕川(Yuh-Chuan Shih)；羅松平(Sung-Ping Lo)；黃文恕(Wen-Shu Huang)

握力最大意志施力 ； 達MVC所需時間 ； 護腕 ； 前臂與手腕姿勢 ； 施力速率 ； grip MVC ； time needed to reach the MVC ； splints ； wrist and forearm postures ； the rate of force development

工業工程學刊

23卷5期（2006 / 09 / 01）

435 - 442

英文

何時能達到最大力量可用於評估力量施用、建立阻抗力及其反應所需時間之關係，以及用來評估肌肉疲勞。本研究主要探討在不同前臂與手腕姿勢下護腕對女性握力最大意志力量(MVC)，及其達MVC所需時間(T(下標 MVC))之影響。共20名女性受試者參與實驗，並採因子實驗設計法，其因子共有四項：受試者、護腕（穿戴與否）、前臂姿勢（肩部內旋0度與30度，以及外旋30度）與手腕姿勢（伸展30度，正中，屈曲30度）。結果顯示前臂姿勢顯著影響握力MVC，但卻不影響T(下標 MVC)：前臂於外旋30度時之握力最小(234.5N)，內旋0度與30度間則無顯著差異(250.3 N vs. 253.2 N)。至於手腕姿勢則顯著影響握力MVC與T(下標 MVC)；正中時握力最大(254.4 N)，屈曲與伸展之間則無顯著差異(239.6 N vs. 244.0 N)；再者，伸展30度時的T(下標 MVC)最長，因此其施力速率亦最緩慢。至於穿戴護腕與否則不影響握力MVC與其T(下標 MVC)。

When peak grip strength is reached may be a useful and interesting index for evaluating strength generation and the relationship between resistance and response time, and as one of selected criteria to quantify the muscle fatigue and the static peak strengths. The present study investigates the influence of wearing splints under different forearm and wrist postures on grip MVC (maximum volitional contraction) as well as the time needed to reach the MVC (denoted by T(subscript MVC)). Twenty female college students took part in this experiment voluntarily. The factorial design with four fixed factors (subject, forearm position, wrist deviation, and splint (with and without)) was employed. The forearm positions were set at 0 and 30 degrees internal (Internal-0 and 30) and 30 degrees external shoulder rotation (External-30). The wrist deviations are extension 30°(E30°), neutral (N0°), flexion 30°(F30°). The results show that the effect of forearm posture changes the grip MVC pronouncedly, but not the TMVC. The forearm at External-30 generates the least MVC (234.5N), and the other two postures are indifferent from each other (250.3 N vs. 253.2 N). As to the effect of wrist posture, it influences both selected responses, the MVC and the T(subscript MVC). The wrist at neutral generates the optimum force (254.4 N), and the other two wrist postures are indifferent (239.6 N vs. 244.0 N). Moreover, wrist posture at E30° also has the longest T(subscript MVC), and the rate of force development is the lowest among the three specified wrist positions. Finally, the presence or absence of splints shifted neither the MVC nor the T(subscript MVC).

1. An, K.N.,E.Y. Chao,L.J. Askew(1983).Functional assessment of upper extremity joints.IEEE Frontiers of Engineering and Computing in Health Care,136-139.
2. Anderson, C.T.(1965).Wrist joint position influences normal hand function
3. Armstrong, T.J.(1986).Ergonomics and cumulative trauma disorders.Hand Clinics,2,553-566.
4. Armstrong, T.J.,S. Ulin,C. Ways(1989).Hand tools and control of cumulative trauma disorders of the upper limb.International Occupational Ergonomics Symposium (3rd), Yugoslavia.
5. Ayoub, M. M.,P. LoPresti(1971).The determination of optimum size cylindrical handle by use of EMG.Ergonomics,14(4),509-518.
6. Bechtol, C.(1954).Grip test: the use of a dynamometer with adjustable handle spacing.Journal of Bone and Hand Surgery,26,820-824.
7. Carey, E.J.,T.J. Gallwey(2002).Effects of wrist posture, pace and exertion on discomfort.International Journal of Industrial Ergonomics,29,85-94.
8. Ćatović, A.,Z. Kosovel,E. Ćatović,O. Muftić(1989).A comparative investigation of the influence of certain arm positions on hand pinch grips in the standing and sitting positions of dentists.Applied Ergonomics,20(2),109-114.
9. Ćatović, E.,A. Ćatović,K. Kraljević,O. Muftić(1991).The influence of arm position on the pinch grip strength of female dentists in standing and sitting positions.Applied Ergonomics,22(3),163-166.
10. Chang, C-H,M-J Wang,S-C Lin(1999).Evaluating the effects of wearing gloves and wrist support on hand-arm response while operating an in-line pneumatic screwdriver.International Journal of Industrial Ergonomics,24,493-481.
11. Chen, W-L,S-U Kuo,Y-C Ou,Y-C Shih(2004).The effect of gloves on gripping performance and muscle fatigue.The 11th Annual Conference of Ergonomics Society of Taiwan
12. Drury, C. G.(1980).Handles for manual materials handles.Applied Ergonomics,11(1),35-42.
13. Garg, A,Hegmann, KT,Schwoerer, B.J.,Kapellusch, J.M.(2002).The effect of mximum voluntary contraction on endurance times for the shoulder girdle.International Journal of Industrial Ergonomics,30,103-113.
14. Hagberg, M(1981).Muscular endurance and surface electromyogram in isometric and dynamic exercise.Journal of Applied Physiology: respiration, Environment, Exercise Physiology,51(1),1-7.
15. Hallbeck, M.S.,D.L. McMullin(1993).Maximal power grasp and threw-jaw chuck pinch force as a function of wrist position, age, and glove type.International Journal of Industrial Ergonomics,11,195-206.
16. Hertzberg, T.(1955).Some contributions of applied physical anthropometry to human engineering.Annals of the New York Academy of Science,63,616-629.
17. Jansen, C.W.S.,S.L. Olson,S.M. Hasson(1997).The effect of use of a wrist orthosis during functional activities on surface electromyography of the wrist extensors in normal subjects.Journal of Hand Therapy,10,283-289.
18. Jung, M-C,Hallbeck, M.S.(2004).Quantification of the effects of instruction type, verbal encouragement, and visual feedback on static and peak handgrip strength.International Journal of Industrial Ergonomics,34,367-374.
19. Kattel B.P.,T.K. Fredericks,J.E. Fernandez,D.C. Lee(1996).The effect of upper-extremity posture on maximum grip strength.International Journal of Industrial Ergonomics,18,423-429.
20. Kellor, M.,J. Frost,N. Silberberg,I. Iverson,R. Cummings(1970).Hand strength and dexterity.American Journal of Occupational Therapy,25(2),77-83.
21. Kraft, G.H.,P.E. Detels(1972).Position of function of the wrist.Archives of Physical Medicine and Rehabilitation,53,272-275.
22. Lamoreaux, L.,M.M. Hoffer(1995).The effect of wrist deviation on grip and pinch strength.Clinical Orthopedics and Related Research,314,152-155.
23. Malone, L.A.,P.L.Gervais,R.S. Burnham,M. Chan,L. Miller,R.D. Steadward(1998).An assessment of wrist splint and glove use on wheeling kinematics.Clinical Biomechanics,13(3),234-236.
24. Marley, R.J.,R.R. Wehrman(1992).Grip strength as a function of forearm rotation and elbow posture.Proceeding of the 36th Annual Meeting of the Human Factors and Ergonomics Society,791-795.
25. Mathiowetz, V.,N. Kashman,G. Volland,K. Weber,M. Dowe,S. Rogers(1985).Grip and pinch strength: Normative data for adults.Archives of Physical Medicine and Rehabilitation,66,16-21.
26. McArdle, W.D.,F.I. Katch,V.L. Katch(1986).“Exercise Physiology: Energy, Nutrition, and Human Performance” (2nd ed.), Lea and Febiger, Philadephia, PA.
27. Mogk, J.P.M.,P.J. Keir(2003).The effects of posture on forearm muscle loading during gripping.Ergonomics,46(9),956-975.
28. Muralidhar, A.,R.R. Bishu,F. Aghazadeh(1994).Glove evaluation: a lesson from impaired hand testing.Advance in Industrial Ergonomics and safety VI.
29. Petrofsky, J. S.,C. Williams,G. Kamen,A.R. Lind(1980).The effect of handgrip span on isometric exercise performance.Ergonomics,23(12),1129-1135.
30. Pryce, J.(1980).The wrist position between neutral and ulnar deviation that facilitates the maximum power grip strength.Journal of Biomechanics,13,505-511.
31. Putz-Anderson, V.(1988).Cumulative Trauma Disorders- A Manual for Musculo-Skeletal Disease of the Upper Limbs.
32. Rempel, D.,R. Manojlovic,D.G. Levinsohn,T. Bloom,L. Gordon(1994).The effect of wearing a flexible wrist splint on carpal tunnel pressure during repetitive hand activity.The Journal of Hand Surgery,19(1),106-110.
33. Rojviroj, S.,W. Sirichativapee,W. Kowsuwon,J. Wongwiwattananon,N. Tamnanthong,P. Jeeravipoolvarn(1990).Pressures in the carpal tunnel: a comparison between patients with carpal tunnel syndrome and normal subjects.Journal of Bone Joint Surgery,72,516-518.
34. Shih, Y-C(2003).The effect of splint on performance of sustained pinching at maximum effort exerting.IEA 2003- the XVth Triennial Congress of the International Ergonomics Association.
35. Shih, Y-C(2005).The effect of a splint on measures of sustained grip exertion under different forearm and wrist postures.Applied Ergonomics,36(3),293-299.
36. Stern, E.B.(1991).Wrist extensor orthoses: dexterity and grip strength across four styles.American Journal of Occupation Therapy,45(1),42-29.
37. Stern, E.B.(1996).Grip strength and finger dexterity across five styles of commercial wrist orthoses.American Journal of Occupation Therapy,50(1),32-38.
38. Stern, E.B.,S.R. Ytterberg,H.E. Krug,G.T. Mullin,M.L. Mahowald(1996).Immediate and short-term effects of three commercial wrist orthoses on grip strength and function in patients with reumatoid arthritis.Arthritis Care and Research,9(1),42-50.
39. Tsaousidis, N.,A. Freivalds(1998).Effects of gloves on maximum force and the rate of force development in pinch, wrist flexion and grip.International Journal of Industrial Ergonomics,21,353-360.
40. Welch, R.(1972).The causes of tenosynovitis in industry.Industrial Medicine,41,16-19.