International Journal of CAD/CAM

한국CDE학회 (Society for Computational Design and Engineering)
권호 표지

Design Improvement of the Smith Machine using Simulation on Musculoskeletal Model

  • Kim, Taewoo (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Lee, Kunwoo (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kwon, Junghoon (Advanced Institutes of Convergence Technology, Seoul National University)
  • 발행 : 2012.04.01
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초록

This study analyzes the characteristics of two different kinds of squat exercise through physical experiments and a computer simulation, i.e. one with a free weight and the other with a Smith machine are studied. This study also proposes a new design for the Smith machine, which has both the advantages of each type based on the results of the analysis. The muscle force and level of stimulation of the lower extremities during squatting were calculated by running an inverse dynamics analysis program on a musculoskeletal model together with the measured motion data. The calculated results were verified by comparing with the measured EMG data. The analysis showed that squatting using free weight is more effective than squatting using the Smith machine. Meanwhile, in order to design an improved Smith machine, which is the final goal of this study, the trajectory of the barbell of the subjects during free weight squatting was measured on the sagittal plane. The measurement showed that the average slope of the trajectory of the barbell is tilted backward by $10.7^{\circ}$. Based on this measurement, this study proposes a tilted design for an improved Smith machine.

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참고문헌

  1. Adams, J.B., Gomez, T.R., Ma, F., Signorile, J.F., and Stoutenberg, M. (2005), The impact of seatback angle on electromyographical activity of the lower back and quadriceps muscles during bilateral knee extension, Journal of Strength and Conditioning Research, 19, 908- 917.
  2. Chiu, L.Z.F., and Salem, G. J. (2006), Comparison of joint kinetics during free weight and flywheel resistance exercise, Journal of Strength and Conditioning Research, 20, 555-562.
  3. Cogley, R.M., Archambault, T.A., Fibeger, J.F., Koverman, M.M., Youdas, J.W., and Hollman, J.H. (2006), Comparison of muscle activation using various hand positions during the push-up exercise, Journal of Strength and Conditioning Research, 19, 628-633.
  4. Cotterman, M.L., Darby, L.A., and Skelly, W.A. (2005), Comparison of muscle force production using the smith machine and free weights for bench press and squat exercises, Journal of Strength and Conditioning Research, 19, 169-176.
  5. Damsgaard, M., Rasmussen, J., Christensen, S.T., Surma, E., and Zee, M.D. (2006), Analysis of musculoskeletal systems in the AnyBody modeling system, Simulation Modeling Practice and Theory, 14, 1100-1111. https://doi.org/10.1016/j.simpat.2006.09.001
  6. Erdemir, A., Mclean, S., Herzog, W., and Bogert, A.J. (2007), Model-based estimation of muscle forces exerted during movements, Clinical Biomechanics, 22, 131-154. https://doi.org/10.1016/j.clinbiomech.2006.09.005
  7. Pandy, M.G. (2001), Computer modeling and simulation of human movement, Annual Review of Biomedical Engineering, 3, 245-273. https://doi.org/10.1146/annurev.bioeng.3.1.245
  8. Rasmussen, J., Damsgaard, M., and Voigt, M. (2001), Muscle recruitment by the min/max criterion - a comparative numerical study, Journal of Biomechanics, 34, 409-415. https://doi.org/10.1016/S0021-9290(00)00191-3
  9. Robertson, G.E., Caldwell, G., Hmill, J., Kamen, G., and Whittlesey, S.N. (2004), Research methods in biomechanics. Human Kinetics.
  10. Signorile, J.F., Zink, A.J., and Szwed, S.P. (2002), A comparative electromyographical investigation of muscle utilization patterns using various hand positions during the lat pull-down, Journal of Strength and Conditioning Research, 16, 539-546.
  11. Winter, D.A. (1990), Biomechanics and motor control of human movement (2nd edn.). Wiley-Interscience.