T J Roberts

Summary

Affiliation: Oregon State University
Country: USA

Publications

  1. ncbi request reprint Energetics of bipedal running. I. Metabolic cost of generating force
    T J Roberts
    Harvard University, Museum of Comparative Zoology, Concord Field Station, Old Causeway Road, Bedford, MA 01730, USA
    J Exp Biol 201:2745-51. 1998
  2. ncbi request reprint Mechanical power output during running accelerations in wild turkeys
    Thomas J Roberts
    Department of Zoology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    J Exp Biol 205:1485-94. 2002
  3. ncbi request reprint The integrated function of muscles and tendons during locomotion
    Thomas J Roberts
    Oregon State University, Department of Zoology, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    Comp Biochem Physiol A Mol Integr Physiol 133:1087-99. 2002
  4. ncbi request reprint Probing the limits to muscle-powered accelerations: lessons from jumping bullfrogs
    Thomas J Roberts
    Biology Department, Northeastern University, 414 Mugar, 360 Huntington Ave, Boston, MA 02115, USA
    J Exp Biol 206:2567-80. 2003
  5. ncbi request reprint Muscle and tendon contributions to force, work, and elastic energy savings: a comparative perspective
    A A Biewener
    Department of Organismic and Evolutionary Biology, Harvard University, Bedford, Massachusetts 01730, USA
    Exerc Sport Sci Rev 28:99-107. 2000
  6. ncbi request reprint Relative shortening velocity in locomotor muscles: turkey ankle extensors operate at low V/V(max)
    Annette M Gabaldón
    Oregon State University, Department of Zoology, Corvallis, OR, USA
    Am J Physiol Regul Integr Comp Physiol 294:R200-10. 2008
  7. ncbi request reprint Muscle strain is modulated more with running slope than speed in wild turkey knee and hip extensors
    Thomas J Roberts
    Brown University, Ecology and Evolutionary Biology Department, Box GB205, Providence, RI 02912, USA
    J Exp Biol 210:2510-7. 2007
  8. ncbi request reprint Sources of mechanical power for uphill running in humans
    Thomas J Roberts
    Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
    J Exp Biol 208:1963-70. 2005
  9. ncbi request reprint Adjusting muscle function to demand: joint work during acceleration in wild turkeys
    Thomas J Roberts
    Oregon State University, Department of Zoology, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    J Exp Biol 207:4165-74. 2004
  10. ncbi request reprint Muscle mechanical advantage of human walking and running: implications for energy cost
    Andrew A Biewener
    Concord Field Station, Dept of Organismic and Evolutionary Biology, Harvard University, Bedford, MA 01730, USA
    J Appl Physiol 97:2266-74. 2004

Detail Information

Publications15

  1. ncbi request reprint Energetics of bipedal running. I. Metabolic cost of generating force
    T J Roberts
    Harvard University, Museum of Comparative Zoology, Concord Field Station, Old Causeway Road, Bedford, MA 01730, USA
    J Exp Biol 201:2745-51. 1998
    ....
  2. ncbi request reprint Mechanical power output during running accelerations in wild turkeys
    Thomas J Roberts
    Department of Zoology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    J Exp Biol 205:1485-94. 2002
    ....
  3. ncbi request reprint The integrated function of muscles and tendons during locomotion
    Thomas J Roberts
    Oregon State University, Department of Zoology, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    Comp Biochem Physiol A Mol Integr Physiol 133:1087-99. 2002
    ..Tendon elastic energy storage and recovery extends the functional range of muscles by uncoupling the pattern of muscle fiber shortening from the pattern of movement of the body...
  4. ncbi request reprint Probing the limits to muscle-powered accelerations: lessons from jumping bullfrogs
    Thomas J Roberts
    Biology Department, Northeastern University, 414 Mugar, 360 Huntington Ave, Boston, MA 02115, USA
    J Exp Biol 206:2567-80. 2003
    ..These results can explain the high power outputs observed in jumping frogs. More generally, our model suggests how the function of non-muscular elements of the musculoskeletal system enhances performance in muscle-powered accelerations...
  5. ncbi request reprint Muscle and tendon contributions to force, work, and elastic energy savings: a comparative perspective
    A A Biewener
    Department of Organismic and Evolutionary Biology, Harvard University, Bedford, Massachusetts 01730, USA
    Exerc Sport Sci Rev 28:99-107. 2000
    ..Isometric or eccentric contractions enhance force and further reduce energy cost. However, elastic savings is probably constrained by the need to reduce compliance for accurate control of position...
  6. ncbi request reprint Relative shortening velocity in locomotor muscles: turkey ankle extensors operate at low V/V(max)
    Annette M Gabaldón
    Oregon State University, Department of Zoology, Corvallis, OR, USA
    Am J Physiol Regul Integr Comp Physiol 294:R200-10. 2008
    ..This observation is consistent with the idea that V/V(max) is an important determinant of locomotor cost because it affects the volume of muscle that must be recruited to support body weight...
  7. ncbi request reprint Muscle strain is modulated more with running slope than speed in wild turkey knee and hip extensors
    Thomas J Roberts
    Brown University, Ecology and Evolutionary Biology Department, Box GB205, Providence, RI 02912, USA
    J Exp Biol 210:2510-7. 2007
    ..Taken together, the speed and slope results suggest that the demand for mechanical work is an important determinant of muscle length patterns in running and walking...
  8. ncbi request reprint Sources of mechanical power for uphill running in humans
    Thomas J Roberts
    Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
    J Exp Biol 208:1963-70. 2005
    ..The increase in hip moment with running incline allows for the production of the power necessary to lift the body. This power may be developed by hip extensors or by transfer of power from muscles at other joints via biarticular muscles...
  9. ncbi request reprint Adjusting muscle function to demand: joint work during acceleration in wild turkeys
    Thomas J Roberts
    Oregon State University, Department of Zoology, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    J Exp Biol 207:4165-74. 2004
    ..These patterns of joint moment and excursion indicate that turkeys increase mechanical work for acceleration primarily by increasing muscle shortening, rather than muscle force...
  10. ncbi request reprint Muscle mechanical advantage of human walking and running: implications for energy cost
    Andrew A Biewener
    Concord Field Station, Dept of Organismic and Evolutionary Biology, Harvard University, Bedford, MA 01730, USA
    J Appl Physiol 97:2266-74. 2004
    ..The low mechanical advantage in running humans may also explain previous observations of a greater metabolic cost of transport for running humans compared with trotting and galloping quadrupeds of similar size...
  11. ncbi request reprint Mechanical function of two ankle extensors in wild turkeys: shifts from energy production to energy absorption during incline versus decline running
    Annette M Gabaldón
    Department of Zoology, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331, USA
    J Exp Biol 207:2277-88. 2004
    ..Our results show that the changing demands for whole body work during steady speed running are met, at least in part, by an ability of single muscles to shift mechanical function from net energy production to net energy absorption...
  12. ncbi request reprint Force-velocity properties of two avian hindlimb muscles
    Frank E Nelson
    Zoology Institute, Oregon State University, 3029 Cordley Hall, Corvallis, OR 97331 2914, USA
    Comp Biochem Physiol A Mol Integr Physiol 137:711-21. 2004
    ..The force-velocity properties of turkey LG and PL muscle do not reveal any extreme differences in the mechanical potential between avian and other vertebrate muscle...
  13. ncbi request reprint Metabolic cost of generating muscular force in human walking: insights from load-carrying and speed experiments
    Timothy M Griffin
    Department of Integrative Biology, University of California, Berkley, California 94720, USA
    J Appl Physiol 95:172-83. 2003
    ..11 +/- 0.03 (SD) J/cm3]. These data indicate that, regardless of the work muscles do, the metabolic cost of walking can be largely explained by the cost of generating muscular force during the stance phase...
  14. doi request reprint Task-dependent force sharing between muscle synergists during locomotion in turkeys
    Frank E Nelson
    Ecology and Evolutionary Biology Department, Brown University, Box GB205, Providence, RI 02912, USA
    J Exp Biol 211:1211-20. 2008
    ..Thus, the LG produced all of the force required for limb extension during swing. This change in the pattern of force sharing between stance and swing supports the theory that force sharing between muscle synergists is task-dependent...
  15. pmc Variable gearing in pennate muscles
    Emanuel Azizi
    Department of Ecology and Evolutionary Biology, Brown University, Providence, RI 02912, USA
    Proc Natl Acad Sci U S A 105:1745-50. 2008
    ..These results suggest that variable gearing in pennate muscles provides a mechanism to modulate muscle performance during mechanically diverse functions...