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Walking & Running; pendulums & springs.







On face value it's very easy to distinguish when someone is walking as opposed to running; they clearly look completely different. But what's different? We know the velocity of movement increases between the two gait patterns. We also know that running contains an aerial phase (a phase where both feet are off the ground), whereas walking does not. Although these factors help describe the common differences, the biggest difference lies in the position of our centre of mass. During walking our centre of mass reaches it's highest point at midstance, whereas during running our centre of mass reaches it's lowest point during midstance. That's the difference. Pretty simple right...




WALKING PENDULUMS:



During walking, the knee stays relatively extended in stance to provide a flexible strut that the body vaults over. This results in the centre of mass being at it's highest point at midstance. This can be likened to an inverted pendulum.







PENDULUMS - ENERGY SAVER!



The straight knee position allows knee & hip to remain closely aligned with GRF, lowering external moment at knee. This means less activation of the knee & hip extensors is required, minimising energy costs. Efficient!







SPRING LOADING:



Running requires the knee to flex during stance. This causes a 5 x increase in knee extensor requirement. It's costly, but it allows the lower limb to act much like a spring or pogo stick and store elastic energy in it's tendons (Farley & Ferris, 1998).








RUNNING SPRINGS:



This means that the centre of mass is at it's lowest point at midstance, which is a result of knee flexion. The more knee flexion range through stance, the larger the centre of mass drop and the longer one potentially spends in stance phase.






PENDULUMS TO SPRINGS:



As one moves from walking to jogging to running to sprinting; the lower limb transitions from more 'pendulum-like' to more 'spring-like.'






GROUND CONTACT TIME:



This shift from pendulum to spring is associated with a change from a heel strike towards a forefoot strike, and a decrease in ground contact time; from longer in walking, to very short in sprinting.








TO STRIKE:



A heel strike is more associated with a pendulum type gait pattern.






TO STRIKE:


A forefoot strike is more associated with a spring-like gait pattern in which the body is attempting to maximise use of elastic energy.







REFERENCES:


•Arampatzis, A., Bruggemann, G.P., Metzler, V. The Effect of Speed on Leg Stiffness and Joint Kinetics in Human Running. Journal of Biomechanics. 32(12): 1349-1353. 1999

•Arampatzis, A., Shade, F., Walsh, M., Bruggemann, G.P. Influence of leg stiffness and its effect on myodynamic jumping performance. Journal Electromyography Kinesiology. 11: 355-364. 2001

•Blickhan, R. The spring mass model for running and hopping. Journal of Biomechanics. 22:1217-1227. 1989

•Bonfim, T.C., Jansne, P.C.A., Barela, J.A. Proprioceptive and behaviour impairments in individuals with anterior cruciate ligament reconstructed knees. Archives Physical Medicine Rehabilitation. 84: 1217-1223. 2003

•Brughelli, M & Cronin, J. Influence of running velocity on vertical, leg and joint stiffness. Sports Medicine. 38: 647-657. 2008

•Butler, R. J., Crowell, H. P., & Davis, I. M. Lower extremity stiffness: implications for performance and injury. Clinical Biomechanics. 18(6): 511-517. 2003

•Chang, Y., Huang, H.C., Hamerski, C.M., Kram, R. The independent effects of gravity and inertia on running mechanics. The Journal of Experimental Biology. 203: 229-238. 2000

•Cormie, P., McGuigan, M.R., Newton, R.U. Changes in the eccentric phase contribute to improved stretch-shorten cycle performance after training. Medicine Science Sports exercise. 42: 1731-1744. 2010

•Craib, M. W., Mitchell, V.A., Fields, K.B., Cooper, T.R., Hopewell, R., Morgan, D.W. The association between flexibility and running economy in sub-elite male distance runners. Medicine Science sports Exercise. 28: 737-743. 2006

•Dalleau, G., Belli, A., Bourdin, M., Lacour, J.R. The spring-mass model and the energy cost of treadmill running. European Journal of Applied Physiology. 77(3): 257-263. 1998

•Dorn, T. W., Schache, A. G., & Pandy, M. G. Muscular strategy shift in human running: dependence of running speed on hip and ankle muscle performance. Journal of Experimental Biology. 215(11): 1944-1956. 2012

•Dutto, D.J., Smith, G. A. Changes in spring-mass characteristics during treadmill running to exhaustion. Medicine Science Sports Exercise. 34: 324-331. 2002

•Farley, C. T., Gonzalez, O. Leg stiffness and stride frequency in human running. Journal of Biomechanics. 29: 181-186. 1996

•Farley, C.T., Glasheen, T.J., Mcmahon, T. Running springs: speed and animal size. Journal Experimental Biology. 185: 71-86. 1993

•Farley, C.T., Morgenroth, D.C. Leg stiffness primarily depends on ankle stiffness during human hopping. Journal of Biomechanics. 32: 267-273. 1999

•Farley, C.T., Saito, J.M., Blickhan, R. Hopping frequency in humans: a test of how springs set stride frequency in bouncing gaits. Journal of Applied Physiology. 71(6): 2127 – 2132. 1992

•Fenn, W. O. The relation between the work performed and the energy liberated in muscular contraction. Journal of physiology. 58: 373-395. 1924

•Gore, S. J., Franklyn-Miller, A., Richter, A., Falvey, E.C., King, E., & Moran, K. Is stiffness related to athletic groin pain? Scandinavian Journal Medicine Science Sports 28:1681–1690. 2018

•Grimston, S. K., Ensberg, J. R., Kloiber, R., & Hanley, D. A. Bone mass, external loads, and stress fractures in female runners. International Journal of Sport Biomechanics. 7: 293-302. 1991

•Gunther, M., & Blickhan, R. Joint stiffness of the ankle and the knee in running. Journal Biomechanics. 35: 1459 – 1474. 2002

•Hamner, S.R., Seth, A., Delp, S.L. Muscle contributions to propulsion and support during running. Journal of Biomechanics. 43(14): 2709-2716. 2012

•Heise, G.D., Martin, P.E. ‘Leg spring’ characteristics and the aerobic demand of running. Medicine and Science in Sports and Exercise. 30: 750-754. 1998

•Hill, A.V. The heat of shortening and dynamics constants of muscles. Proc. R. Soc. Lond. B. London: Royal Society. 126 (843): 136–195. 1938

•Hobara, H., Kimura, K., Omuro K., Gomi, K., Muraoka, T., Sakamoto, M. Differences in lower extremity stiffness between endurance trained athletes and untrained subjects. Journal Science Medicine Sport. 13: 106-111. 2010

•Hunter, J.P., Marshall, R.N. Effects of power and flexibility training on vertical jump technique. Medicine Science Sports Exercise. 34: 478-486. 2002

•Ker, R. F., Bennett, M. B., Bibby, S. R., Kester, R. C. and Alexander, R. M. N. The spring in the arch of the human foot. Nature. 325: 147-149. 1987

•Kubo, K., Kanehisa, H., Fukunaga, T. Gender differences in the viscoelastic properties of tendon structures. European Journal Applied Physiology. 88: 520-526. 2002

•Kuitunen, S., Komi, P.V., Kryolainen, H. Knee and ankle joint stiffness in sprint running. Medicine Science Sports Exercise. 34: 166-173. 2002

•Laffaye, G., Bardy, B., Durey, A. Leg Stiffness and Expertise in Men Jumping. Medicine & Science in Sports & Exercise. 37(4): 536-543. 2005

•Lenhart, R.L., Thelen, D.G., Wille, C.M., Chumanov, E.S., Heiderscheit, B.C. Increasing Running Step Reduces Patellofemoral Joint Forces. Medicine Science Sports Exercise. 46(3): 557-564. 2014

•Lichtwark, G.A., Wilson, A.M. Is Achilles Tendon Compliance Optimised for Maximum Muscle Efficiency During Locomotion? Journal Biomechanics,40(8): 1768-1775. 2007

•Lorimer, A.V., Hume, P.A. Stiffness as a Risk Factor for Achilles Tendon Injury in Running Athletes. Sports Medicine. 46: 1921-1938. 2016

•Mcmahon, J.J., Comfort, P., Pearson, S. Lower limb stiffness: Effect on Performance and Training Considerations. Strength & Conditioning Journal. 34(6): 94 -101. 2012

•Mcmahon, T.A., Greene, P.R. The influence of track compliance on running. Journal of Biomechanics. 12(12): 893-904. 1979

•Mcmahon, T.A., Valiant, G., Frederick, E.C. Groucho running. Journal Applied Physiology. 62: 2326-2337. 1987

•Morin, J., Dalleau, G., Kyrolainen, H., Jeannin, T., Belli, A. A simple method for measuring stiffness during running. Journal Applied Biomechanics. 21: 167-180. 2005

•Morin, J.B., Edouard, P., & Samozino, P. Technical ability of force application as a determinant factor of sprint performance. Medicine Science Sports Exercise. 43(9): 1680-1688. 2011

•Padua, D.A., Arnold, B.L., Carcia, C.R., Granata, K.P. Gender Differences in Leg stiffness and Stiffness Recruitment Strategy During-Two-Legged Hopping. Journal Mot Behaviour. 37(2): 111-125. 2005

•Pickering Rodriguez, E.C., Watsford, M., Bower, R.G., Murphy, A.J. The relationship between lower-body stiffness and injury incidence in female netballers. Sports Biomechanics. 16(3): 361-373. 2017

•Pruyn, E.C., Watsford, M.L., Murphy, A.J., Pine, M.J., Spurrs, R.W., Cameron, M.L., Johnston, R.J. Relationship between leg stiffness and lower body injuries in professional Australian football. Journal of Sports Sciences. 30(1):71-78. 2011

•Roberts, T.J. The Integrated Function of Muscles and Tendons During Locomotion. Integrated Physiology.133(4): 1087-1099. 2002

•Seyfarth, A., Blickhan, R., Van Leeuwen, J. Optimum take-off techniques and muscle design for long jump. Journal Experimental Biology. 203: 41–750. 2000

•Spurrs, R.W., Murphy, A.J., Watsford, M.L. The effect of plyometric training on distance running performance. European Journal of Applied Physiology. 89(1): 1-7. 2003

•Stefanyshyn, D.J., & Nigg, B.M. Dynamic angular stiffness of the ankle joint during running and sprinting. Journal Applied Biomechanics. 14: 292 – 299. 1998

•Toumi, H., Best, T.M., Martin, A., Poumarat, G. Muscle plasticity after weight and combined (weight plus jump) training. Medicine Science Sports Exercise. 36: 1580-1588. 2004

•Turner, A. N., Jeffreys, I. The Stretch-Shortening Cycle: Proposed mechanisms and methods for enhancement. Strength & Conditioning Journal. 32(4): 87-99. 2010

•Turner, A.N., Owings, M., Schwane, J.A. Improvement in Running Economy After 6 Weeks of Plyometric Training. Journal Strength Conditioning Research. 17(1): 60-67. 2003

•Walshe, A.D., Wilson, G.J. The Influence of Musculotendinous Stiffness on Drop Jump Performance. Canadian Journal Applied Physiology. 22(2): 117-132. 1997

•Watsford, M. L., Murphy, A. J., McLachlan, K. A., Bryant, A. L., Cameron, M. L., Crossley, K. M., & Makdissi, M. A prospective study of the relationship between lower body stiffness and hamstring injury in professional Australian Rules footballers. American Journal of Sports Medicine. 38(10): 2058-2064. 2010

•Williams, D. S., Davis, I. M., Scholz, J. P., Hamill, J., & Buchanan, T. S. High- arched runners exhibit increased leg stiffness compared to low-arched runners. Gait and Posture. 19(3): 263-269. 2004

•Williams, D.S., McClay, I.M., Hamill, J., Buchanan, T.S. Lower extremity kinematic and kinetic differences in runners with high and low arches. Journal Applied Biomechanics. 17(2): 153-163. 2001


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