International Journal of Physiotherapy and Research

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Type of Article : Review

Year: 2014 | Volume 2 | Issue 6 | Page No. 766-771

Date of Publication: 23-11-2014

DOI: 10.16965/ijpr.2014.689


R. Vinodh Rajkumar.  

Founder: PALEOLITHICX, Physiotherapist & Functional Fitness Training Instructor (Freelance), Bangalore, Karnataka, India.

Corresponding author: R. Vinodh Rajkumar, # 638, 1st Floor, Jakkuramma Building, Behind Eswara Temple, 1st Cross, 1st Main, Mathikere, Bangalore-560054, Karnataka, India. Mobile: +919008424632


Exploration of the biomechanical interaction of musculoskeletal system keeps endorsing the fact that the human body can ensure efficient biomechanics without any kinematic aberrations in the joints. Excluding the injuries caused by unexpected collisions, the major potential factors that ruin the protective configuration of musculoskeletal system can be lack of exercise and incorrect exercise. A fresh perspective; ‘force couple mechanics (FCM) on femur’ (torque on femur by two muscular forces in opposite directions at two different locations), has been discussed in this article using fundamental information on anatomical linkages of muscles & correlation of various scientific reports, finally expected to stimulate electromyographic studies to dig out further scientific data.
KEYWORDS: Force couple mechanics on femur, Gluteus maximus, Vasti.


  1. Caterisano A, Moss RF, Pellinger TK, Woodruff K, Lewis VC, Booth W, Khadra T. The effect of back squat depth on the EMG activity of 4 superficial hip and thigh muscles. J Strength Cond Res. Aug 2002; 16(3): 428-32.
  2. Escamilla RF, Fleisig GS, Zheng N, Barrentine SW, Wilk KE, Andrews JR, Biomechanics of the knee during closed kinetic and open kinetic chain exercises. Med Sci Sport Exerc. 1998;30:556-69.
  3. De Leva P, Adjustments to Zatsiorsky-Seluyanov’s Segment Inertia Parameters, Journal of Biomechanics 1996;29(9):1223-1230.
  4. Plagenhoef S, Evans F.G, Abdelnour T. Anatomical data for analyzing human motion. Research Quarterly for Exercise and Sport 1983;54;169-178.
  5. Pearsall DJ, Reid JG, The study of human body segment parameters in biomechanics. An historical review and current status report, Sports Med. 1994 Aug;18(2):126-40.
  6. Mike Decker, Jake Krong, Dan Peterson, Tyler Anstett, Michael Torry, Erik Giphart, Kevin Shelburne,Marc Philippon, Deep hip muscle activation during a squat exercise. Retrieved from
  7. Cheron G, Bengoetxea A, Pozzo T, Bourgeois M, Draye JP. Evidence of a preprogrammed deactivation of the hamstring muscles for triggering rapid changes of posture in humans. Electroenceph Clin Neurophysiol. 1997;105:58–71.
  8. Valdeci Carlos Dionisio, Gil Lucio Almeida, Marcos Duarte, Rogerio Pessoto Hirata Kinematic, Kinetic and EMG patterns during downward squatting, Journal of Electromyography and Kinesiology 2008;18:134-143.
  9. Escamilla, RF. Knee biomechanics of the dynamic squat exercise. Med Sci Sports Exerc. 2001;33:127–141, 2001.
  10. Yasuda, K., and T. Sasaki. Exercise after anterior cruciate ligament reconstruction: the force exerted on the tibia by the separate isometric contractions of the quadriceps or the hamstrings. Clin.Orthop.1987; 220:275–283.    
  11. Senter C, Hame SL. Biomechanical analysis of tibial torque and knee flexion angle: Implications for understanding knee injury. Sports Med. 2006;36:635–641.
  12. Shields RK, Madhavan S, Gregg E, Leitch J, Petersen B, Salata S, et al. Neuromuscular control of the knee during a resisted single-limb squat exercise. Am J Sports Med. 2005;33:1520-6.
  13. Toutoungi, D.E., T.W.Lu, A. Leardini, F. Catani, and J.J. O’Connor. Cruciate ligament forces in the human knee during rehabilitation exercises. Clin. Biomech. 2000;15:176 –187.
  14. Elias JJ, Faust AF, Chu Y, Chao EY, Cosgarea AJ. The soleus muscle acts as an agonist for the anterior cruciate ligament: an in vitro experimental study. Am J Sports Med. 2003;31:241-6.
  15. Stuart MJ, Meglan DA, Lutz GE, Growney ES, An KN. Comparison of intersegmental tibiofemoral joint forces and muscle activity during various closed kinetic chain exercises. Am J Sports Med. 1996 Nov-Dec;24(6):792-9.
  16. Li, G, DeFrate, LE, Rubash, HE, and Gill, TJ. In vivo kinematics of the ACL during weight bearing knee flexion. J Orthop Res 2005;23:340-344.
  17. Kreighbaum, E., Katharine, B.M., Biomechanics; A Qualitative Approach for Studying Human Movement, Allyn & Bacon. 1996;Pgs 203-204.
  18. Donnelly, DV, Berg, WP, and Fiske, DM. The effect of the direction of gaze on the kinematics of the squat exercise. J Strength Cond Res. 2006;20:145–150.
  19. Cholewicki, J., Juluru, K., McGill, S. Intra-abdominal Pressure Mechanism for Stabilizing the Lumbar Spine. Journal of Biomechanics 1999;32:13-17.
  20. Richardson C., Jull G., Hodges P. and Hides J. Therapeutic Exercise For Spinal Segmental Stabilization In Low Back Pain - Scientific Basis And Clinical Approach. London, New York, Philidelphia, Sydney, Toronto: Churchill Livingstone,1999, 6 p. 55-58.

R. Vinodh Rajkumar. FORCE COUPLE MECHANICS ON FEMUR DURING CLOSED KINETIC CHAIN ACTIVITIES OF LOWER LIMBS. Int J Physiother Res 2014;2(6):766-771. DOI: 10.16965/ijpr.2014.689




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