R Kram

Summary

Affiliation: University of California
Country: USA

Publications

  1. ncbi request reprint How animals move: an integrative view
    M H Dickinson
    Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
    Science 288:100-6. 2000
  2. ncbi request reprint Force treadmill for measuring vertical and horizontal ground reaction forces
    R Kram
    Department of Integrative Biology, University of California, Berkeley, California 94720 3140, USA
    J Appl Physiol 85:764-9. 1998
  3. ncbi request reprint Effect of reduced gravity on the preferred walk-run transition speed
    R Kram
    Human Biodynamics Department, University of California, Berkeley 94720 4480, USA
    J Exp Biol 200:821-6. 1997
  4. ncbi request reprint Energetics and biomechanics of locomotion by red kangaroos (Macropus rufus)
    R Kram
    Department of Integrative Biology, University of California, Berkeley 94720 3140, USA
    Comp Biochem Physiol B Biochem Mol Biol 120:41-9. 1998
  5. ncbi request reprint Exploring dynamic similarity in human running using simulated reduced gravity
    J M Donelan
    Integrative Biology Department, University of California, Berkeley, CA 94720 3140, USA
    J Exp Biol 203:2405-15. 2000
  6. ncbi request reprint Walking in simulated reduced gravity: mechanical energy fluctuations and exchange
    T M Griffin
    Department of Integrative Biology, University of California, Berkeley, California 94720 3140
    J Appl Physiol 86:383-90. 1999
  7. ncbi request reprint Muscular force or work: what determines the metabolic energy cost of running?
    R Kram
    Integrative Biology Department, University of California, Berkeley 94720 3140, USA
    Exerc Sport Sci Rev 28:138-43. 2000
  8. ncbi request reprint Metabolic cost of generating horizontal forces during human running
    Y H Chang
    Locomotion Laboratory, Department of Integrative Biology, University of California, Berkeley, California 94720 3140, USA
    J Appl Physiol 86:1657-62. 1999
  9. ncbi request reprint Three-dimensional kinematics and limb kinetic energy of running cockroaches
    R Kram
    Department of Integrative Biology, University of California at Berkeley, 94720 3140, USA
    J Exp Biol 200:1919-29. 1997
  10. ncbi request reprint Applied horizontal force increases impact loading in reduced-gravity running
    Y H Chang
    Locomotion Laboratory, Department of Integrative Biology, University of California, Berkeley, CA 94720 3140, USA
    J Biomech 34:679-85. 2001

Collaborators

Detail Information

Publications11

  1. ncbi request reprint How animals move: an integrative view
    M H Dickinson
    Department of Integrative Biology, University of California, Berkeley, CA 94720, USA
    Science 288:100-6. 2000
    ..Integrative approaches reveal not only how each component within a locomotor system operates but how they function as a collective whole...
  2. ncbi request reprint Force treadmill for measuring vertical and horizontal ground reaction forces
    R Kram
    Department of Integrative Biology, University of California, Berkeley, California 94720 3140, USA
    J Appl Physiol 85:764-9. 1998
    ..This device greatly decreases the time and laboratory space required for locomotion experiments and clinical evaluations. The modular design allows for independent use of both treadmill and force platform...
  3. ncbi request reprint Effect of reduced gravity on the preferred walk-run transition speed
    R Kram
    Human Biodynamics Department, University of California, Berkeley 94720 4480, USA
    J Exp Biol 200:821-6. 1997
    ..This supports the hypothesis that the walk-run transition is triggered by the dynamics of an inverted-pendulum system...
  4. ncbi request reprint Energetics and biomechanics of locomotion by red kangaroos (Macropus rufus)
    R Kram
    Department of Integrative Biology, University of California, Berkeley 94720 3140, USA
    Comp Biochem Physiol B Biochem Mol Biol 120:41-9. 1998
    ..The cost of transport (J kg-1 m-1) decreases at faster hopping speeds, yet red kangaroos prefer to use relatively slow speeds that avoid high levels of tendon stress...
  5. ncbi request reprint Exploring dynamic similarity in human running using simulated reduced gravity
    J M Donelan
    Integrative Biology Department, University of California, Berkeley, CA 94720 3140, USA
    J Exp Biol 203:2405-15. 2000
    ..This suggests that a single unifying hypothesis for the effects of size, velocity and gravity on both walking and running gaits will not be successful...
  6. ncbi request reprint Walking in simulated reduced gravity: mechanical energy fluctuations and exchange
    T M Griffin
    Department of Integrative Biology, University of California, Berkeley, California 94720 3140
    J Appl Physiol 86:383-90. 1999
    ..00, 0.75, and 0.50 G (average 64.4%), although it decreased to 48% at 0.25 G. As a result, the amount of work performed on the center of mass does not explain the relatively high metabolic cost of walking in simulated reduced gravity...
  7. ncbi request reprint Muscular force or work: what determines the metabolic energy cost of running?
    R Kram
    Integrative Biology Department, University of California, Berkeley 94720 3140, USA
    Exerc Sport Sci Rev 28:138-43. 2000
    ..Whole animal experiments, in vivo muscle force and fascicle length recordings, and in vitro muscle shortening velocity data support the idea...
  8. ncbi request reprint Metabolic cost of generating horizontal forces during human running
    Y H Chang
    Locomotion Laboratory, Department of Integrative Biology, University of California, Berkeley, California 94720 3140, USA
    J Appl Physiol 86:1657-62. 1999
    ..Our data suggest that generating horizontal propulsive forces constitutes more than one-third of the total metabolic cost of normal running...
  9. ncbi request reprint Three-dimensional kinematics and limb kinetic energy of running cockroaches
    R Kram
    Department of Integrative Biology, University of California at Berkeley, 94720 3140, USA
    J Exp Biol 200:1919-29. 1997
    ..The relatively small leg mass and inertia of hexapeds may allow relatively high leg cycling frequencies without exceptionally high internal mechanical energy generation...
  10. ncbi request reprint Applied horizontal force increases impact loading in reduced-gravity running
    Y H Chang
    Locomotion Laboratory, Department of Integrative Biology, University of California, Berkeley, CA 94720 3140, USA
    J Biomech 34:679-85. 2001
    ..An appropriate AHF could easily augment existing partial gravity treadmill running exercise countermeasures used during spaceflight and help prevent musculoskeletal degradation...
  11. pmc Mechanical and metabolic determinants of the preferred step width in human walking
    J M Donelan
    Department of Integrative Biology, University of California, Berkeley, CA 94720 3140, USA
    Proc Biol Sci 268:1985-92. 2001
    ..12L, which is not significantly different from foot width (0.11L) or the preferred step width (0.13L). Humans appear to prefer a step width that minimizes metabolic cost...