The sources of external work in level walking and running

The Journal of Physiology
G A CavagnaA Zamboni

Abstract

The work done at each step during level walking and running to lift the centre of mass of the body, Wv, and to increase its forward speed, Wf, and the total mechanical energy involved (potential + kinetic) Wext, have been measured at various 'constant' speeds (2-32 km/hr) with the technique described by Cavagna (1975). 2. At intermediate speeds of walking (about 4 km/hr) Wv = Wf and Wext/km is at a minimum, as is the energy cost. At lower speeds Wv greater than Wf whereas at higher speeds Wf greather than Wv: in both cases Wext/km increases. 3. The recovery of mechanical energy, through the pendular motion characteristic of walking, was measured as (/Wv/ + /Wf/ - Wext)/(/Wv/ + /Wf/): it attains a maximum (about 65%) at intermediate speeds. 4. A simple model, assuming that in walking the body rotates as an inverted pendulum over the foot in contact with the ground, fits the experimental data better at intermediate speeds but is no longer tenable above 7 km/hr. 5. In running the recovery defined above is minimal (0-4% independent of speed), i.e. Wext congruent to /Wv/ + /Wf/: potential and kinetic energy of the body do not interchange but are simultaneously taken up and released by the muscles with a rate increasing markedly with...Continue Reading

Citations

Jan 1, 1990·European Journal of Applied Physiology and Occupational Physiology·G J van Ingen SchenauG de Groot
Apr 20, 2014·Physiological Reports·Jean-Louis HoneineManh-Cuong Do
May 6, 2014·Research in Developmental Disabilities·Firooz SalamiManuela Galli
Dec 10, 2013·The Spine Journal : Official Journal of the North American Spine Society·Philippe MahaudensChristine Detrembleur
May 23, 1998·The Journal of Physiology·B SchepensG A Cavagna
Jan 26, 2002·Gait & Posture·Brona McDowellRichard Baker
Mar 14, 2003·Gait & Posture·Frank C Anderson, Marcus G Pandy
Dec 5, 2003·Gait & Posture·C DetrembleurT Lejeune
Nov 9, 2004·Gait & Posture·Frédéric DierickChristine Detrembleur
Dec 2, 2006·Biological cybernetics·Christine AzevedoChristine Assaiante
Feb 19, 2009·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·P MahaudensC Detrembleur
Apr 25, 2009·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·P MahaudensX Banse
Dec 19, 2001·Journal of Biomechanics·J Maxwell DonelanArthur D Kuo
Nov 5, 2002·Journal of Biomechanics·Michael Günther, Reinhard Blickhan
Nov 26, 2002·Journal of Biomechanics·Constantinos N Maganaris, John P Paul
Jun 3, 2005·Metabolism: Clinical and Experimental·Wayne T WillisRichard M Herman
Jan 1, 1994·European Journal of Applied Physiology and Occupational Physiology·A E MinettiG Ferretti
Jan 1, 1992·European Journal of Applied Physiology and Occupational Physiology·P ZamparoG Ferretti
Jan 1, 1992·European Journal of Applied Physiology and Occupational Physiology·S Cheng
Jan 1, 1994·European Journal of Applied Physiology and Occupational Physiology·P Wretenberg, U P Arborelius
Jan 15, 2005·European Journal of Applied Physiology·G J BastienN C Heglund
Jan 1, 1986·European Journal of Applied Physiology and Occupational Physiology·M O EricsonJ Ekholm
May 15, 2008·European Journal of Applied Physiology·Joakim J GeninPatrick A Willems
Jun 29, 2010·European Journal of Applied Physiology·Thierry P GosseyeNorman C Heglund
Sep 16, 2010·European Journal of Applied Physiology·Kate LydenPatty S Freedson
Mar 30, 2012·European Journal of Applied Physiology·Paolo TabogaPietro E di Prampero
Oct 16, 2012·European Journal of Applied Physiology·G MauroyP A Willems
Feb 1, 1991·Journal of Neurology·R J ElbleJ Colliver
Mar 23, 2013·Science·Chen LiDaniel I Goldman
Nov 28, 2001·Equine Veterinary Journal. Supplement·D F Preedy, G R Colborne
Aug 19, 2006·Experimental Brain Research·Yasuhiro OsakiTheodore Raphan
Mar 21, 2007·Experimental Brain Research·Betty J MohlerWilliam H Warren
Dec 7, 2006·Biology Letters·James R Usherwood, Alan M Wilson
Dec 14, 2007·Proceedings. Biological Sciences·G A CavagnaL A Peyré-Tartaruga
Mar 2, 2002·Journal of Biomechanical Engineering·Arthur D Kuo

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