C. Gregory and C. Bickel, Recruitment patterns in human skeletal muscle during electrical stimulation, Phys Ther, vol.85, issue.4, pp.358-64, 2005.

J. Kramer, D. Lindsay, D. Magee, S. Mendryk, and T. Wall, Comparison of Voluntary and Electrical Stimulation Contraction Torques, Journal of Orthopaedic & Sports Physical Therapy, vol.5, issue.6, pp.324-355, 1984.
DOI : 10.2519/jospt.1984.5.6.324

R. Locicero, The Effect of Electrical Stimulation on Isometric and lsokinetic Knee Extension Torque: Interaction of the Kinestim Electrical Stimulator and the Cybex II+??, Journal of Orthopaedic & Sports Physical Therapy, vol.13, issue.3, pp.143-151, 1991.
DOI : 10.2519/jospt.1991.13.3.143

V. Strojnik, The effects of superimposed electrical stimulation of the quadriceps muscles on performance in different motor tasks, J Sports Med Phys Fitness, vol.38, issue.3, pp.194-200, 1998.

S. Westing, J. Seger, and A. Thorstensson, Effects of electrical stimulation on eccentric and concentric torque-velocity relationships during knee extension in man, Acta Physiologica Scandinavica, vol.110, issue.1
DOI : 10.1111/j.1748-1716.1990.tb08971.x

T. Hortobagyi, N. Lambert, C. Tracy, and M. Shinebarger, Voluntary and electromyostimulation forces in trained and untrained men, Med Sci Sports Exerc, vol.24, issue.6, pp.702-709, 1992.

R. Walmsley, G. Letts, and J. Vooys, A Comparison of Torque Generated by Knee Extension With a Maximal Voluntary Muscle Contraction vis-a-vis Electrical Stimulation, Journal of Orthopaedic & Sports Physical Therapy, vol.6, issue.1
DOI : 10.2519/jospt.1984.6.1.10

E. Fess and C. Moran, Clinical assessment recommendations, 1981.

B. Bigland and O. Lippold, Motor unit activity in the voluntary contraction of human muscle, The Journal of Physiology, vol.125, issue.2, pp.322-357, 1954.
DOI : 10.1113/jphysiol.1954.sp005161

J. Kramer, Effect of Electrical Stimulation Current Frequencies on Isometric Knee Extension Torque, Physical Therapy, vol.67, issue.1, pp.31-39, 1987.
DOI : 10.1093/ptj/67.1.31

E. Weiss and M. Flander, Muscular and Postural Synergies of the Human Hand, Journal of Neurophysiology, vol.92, issue.1, 2003.
DOI : 10.1152/jn.01265.2003

O. Driscoll, S. Horii, E. Ness, R. Cahalan, T. Richards et al., The relationship between wrist position, grasp size, and grip strength, The Journal of Hand Surgery, vol.17, issue.1, pp.169-77, 1992.
DOI : 10.1016/0363-5023(92)90136-D

E. Huskisson, MEASUREMENT OF PAIN, The Lancet, vol.304, issue.7889, pp.1127-1158, 1974.
DOI : 10.1016/S0140-6736(74)90884-8

W. Hanten, W. Chen, A. Austin, R. Brooks, H. Carter et al., Maximum grip strength in normal subjects from 20 to 64 years of age, Journal of Hand Therapy, vol.12, issue.3, pp.193-200, 1999.
DOI : 10.1016/S0894-1130(99)80046-5

C. Crosby, M. Wehbé, and B. Mawr, Hand strength: Normative values, The Journal of Hand Surgery, vol.19, issue.4, pp.665-70, 1994.
DOI : 10.1016/0363-5023(94)90280-1

J. Firrell and G. Crain, Which setting of the dynamometer provides maximal grip strength?, The Journal of Hand Surgery, vol.21, issue.3, pp.397-401, 1996.
DOI : 10.1016/S0363-5023(96)80351-0

S. Collins, R. Moore, and H. Mcquay, The visual analogue pain intensity scale: what is moderate pain in millimetres?, Pain, vol.72, issue.1, pp.95-102, 1997.
DOI : 10.1016/S0304-3959(97)00005-5

M. Miller, U. Flansbjer, K. Downham, and J. Lexell, Superimposed Electrical Stimulation, American Journal of Physical Medicine & Rehabilitation, vol.86, issue.3, pp.945-50, 2006.
DOI : 10.1097/01.phm.0000247648.62957.19

F. Valero-cuevas, Predictive modulation of muscle coordination pattern magnitude scales fingertip force magnitude over the voluntary range, J Neurophysiol, vol.83, issue.3, pp.1469-79, 2000.

F. Valero-cuevas, F. Zajac, and C. Burgar, Large index-fingertip forces are produced by subject-independent patterns of muscle excitation, Journal of Biomechanics, vol.31, issue.8, pp.693-703, 1998.
DOI : 10.1016/S0021-9290(98)00082-7

P. Merton, Voluntary strength and fatigue, The Journal of Physiology, vol.123, issue.3, pp.553-564, 1954.
DOI : 10.1113/jphysiol.1954.sp005070