The Spine Journal
Volume 3, Issue 1 , Pages 46-54 , January 2003

An electromyographic study of isokinetic axial rotation in young adults

  • Shrawan Kumar, PhD., DSc.

      Affiliations

    • Corresponding Author InformationCorresponding author. Department of Physical Therapy, 3-75 Corbett Hall, University of Alberta, Edmonton, AB T6G 2G4, Canada. Tel.: (780) 492-5979; fax: (780) 492-1626.
    • ,
  • Yogesh Narayan, BSc.
    • ,
  • Doug Garand, BSc

Received 27 February 2002 ,Accepted 4 June 2002.

References 

  1. Kumar S. Isolated planar trunk strength measurement in normals. Part III (results and database). Int J Indust Ergonom. 1996;17:103–111
  2. Kumar S, Narayan Y. EMG spectral characteristics of spinal muscles during isometric axial rotation. J Electromyog Kinesiol. 1999;9,1:21–37
  3. Kumar S, Narayan Y, Stein RB, Snijders C. Muscle fatigue in axial rotation of the trunk. Int J Indust Ergonom. 2001;28:113–125
  4. Marras WS, Mirka GA. Muscle activities during asymmetric trunk angular accelerations. J Ortho Res. 1990;8:824–832
  5. Marras WS, Mirka GA. A comprehensive evaluation of trunk response to asymmetric trunk motion. Spine. 1991;17:318–326
  6. Marras WS, Davis KG, Granata KP. Trunk muscle activities during asymmetric twisting motions. J Electro Kinesiol. 1998;8:247–256
  7. McGill SM. Electromyography activity of the abdominal and low back musculature during the generation of isometric and dynamic axial trunk torque (implications for lumbar mechanics). J Ortho Res. 1991;9:91–103
  8. Pope MH, Svensonn M, Andersson GBJ, Broman H, Zetterberg C. The role of pre-rotation of the trunk in axial twisting efforts. Spine. 1987;12:1041–1045
  9. Watkins RG, Dennis S, Dillin WH, Schnebel B, Schniederman G, Jobe F, et al. Dynamic EMG analysis of torque transfer in professional baseball pitchers. Spine. 1989;14:404–408
  10. Schaffer H. In: Back injuries associated with lifting (Bulletin 2144). Washington, DC: Department of Labor, Bureau of Labor Statistics; 1982;p. 1–20
  11. Manning DP, Mitchell RG, Blanchfield LP. Body movements and events contributing to accidental and non-accidental back injuries. Spine. 1984;9:734–749
  12. Kumar S. Axial rotation strength in seated neutral and pre-rotated postures of young adults. Spine. 1997;22:2213–2221
  13. Kumar S, Narayan Y. Spectral parameters of trunk muscles during fatiguing isometric axial rotation in neutral posture. J Electromyog Kinesiol. 1998;8:257–267
  14. Kumar S, Dufresne RM, Van Schoor T. A pilot study of human trunk strength profile in lateral flexion and axial rotation. Spine. 1995;20:169–177
  15. Kumar S, Narayan Y, Zedka M. An electromyographic study of unresisted trunk rotation with normal velocity among healthy subjects. Spine. 1996;21(13):1500–1512
  16. Marras WS, Mirka GA. Trunk strength during asymmetric trunk motion. Human Factors. 1989;31(6):667–677
  17. McGill SM. The influence of lordosis on axial trunk torque and trunk muscle myoelectric activity. Spine. 1992;17:1187–1193
  18. Kumar S, Panjabi MM. Axial rotation and spinal laxity (neutral zone) in vivo. J Spinal Disord. 1995;8:253–263
  19. Kumar S, Dufresne RM, Garand D. Effect of posture on back strength. Int J Indust Ergonom. 1991;7:53–62
  20. Kumar S, Garand D. Static and dynamic strength at different reach distances in symmetrical and asymmetrical planes. Ergonomics. 1992;35(7,8):861–880
  21. Kumar S, Mital A. Margin of safety for the human back (a probable consensus based on published studies). Ergonomics. 1992;35(7,8):769–781

☆ FDA device/drug status: not applicable. Support in whole or in part was received from Medical Research Council.

PII: S1529-9430(02)00447-3

The Spine Journal
Volume 3, Issue 1 , Pages 46-54 , January 2003

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